Why MLS Comps Miss the Mark at Sheriff Sales, and How to Set Your Bid Ceiling Using Actual Auction Data

You pulled comps on a three-bedroom ranch in Franklin County. Five comparable sales, all within a half-mile, all sold in the last six months. Your ARV came back at $220,000. You applied a conservative 25% discount, set your max bid at $165,000, and felt good about it. Then the auction happened. The property sold for $125,000. To another investor who knew something you didn't.

MLS comps vs auction data at a sheriff sale tells two completely different stories. The MLS told you what that house would sell for after it was renovated, staged, listed with an agent, inspected, appraised, and financed by a buyer with a 30-year mortgage. The auction told you what an investor would actually pay for a distressed property, sold as-is, with cash, in a courthouse lobby on a Tuesday morning.

That gap between those two numbers is where investors lose money. And it's wider than most people think.

The ARV Gap: Why MLS Comps Overestimate Auction Values by 20-60%

ARV stands for After Repair Value. It's the estimated price a property would sell for on the open market after renovations. It's calculated by looking at comparable sales on the MLS (Multiple Listing Service, the database real estate agents use to list properties).

The problem is that MLS sales represent the retail market. Every property that closed on the MLS had things going for it that sheriff sale properties don't.

MLS sales assume the property is in market-ready condition, that a buyer can finance with a conventional mortgage, that a title company confirmed clear title, that the buyer had an inspection period and could walk away, and that an agent marketed the property to the widest possible buyer pool.

Sheriff sales offer none of that. Ohio sheriff sales are sold strictly as-is, with no inspection access in most counties. You're paying cash or cash-equivalent within 30 days. There may be liens that survived the foreclosure (IRS federal tax liens survive the sale, and the IRS gets a 120-day redemption right). There are no seller disclosures. And you need a statutory deposit on the spot (per ORC 2329.211, deposits range from $2,000 to $10,000 depending on appraised value).

Stack up those differences and the 20-60% gap between MLS values and auction prices makes sense. Auction buyers are taking on more risk, paying cash, and buying blind. The market prices that in. But MLS comps don't account for any of it.

What 20,000 Investors Using AI Comp Tools Are Getting Wrong

Tools like ChatARV, PropStream, and Bricked.ai have made pulling comps faster than ever. ChatARV alone has 20,000 active users running AI-powered comparable sales analysis. PropStream launched an AI chatbot called Intelligence Assistant in April 2026. Bricked.ai offers 100 comps per month for $49.

These tools do what they do well. They pull MLS data, identify comparable properties by square footage, bedroom count, proximity, and sale date, then generate an ARV estimate. ChatARV ranges from $19 to $149 per month. PropStream runs $99 per month with broader data features beyond just comps.

But none of them answer the question sheriff sale investors actually need answered: What do properties like this one sell for at auction?

They can tell you a renovated three-bedroom in Westerville sold for $285,000 last month. They can't tell you that a similar property two streets over sold at the Franklin County sheriff sale for $160,000 last week.

That's not a knock on those tools. They weren't built for auction investing. They were built for the retail market, wholesalers, and flippers who need post-rehab comps. The problem is when auction investors use retail comps to set auction bids. It's the wrong data for the decision you're making.

The Data That Actually Matters: Weekly Auction Sale Prices by County

If MLS comps tell you what a property is worth after rehab, what tells you what it's worth at auction? Actual auction results.

Every week, Ohio counties run sheriff sales. Properties are listed with an appraised value and a minimum bid (two-thirds of appraised value on the first sale). Some sell. Some don't. The ones that sell establish a real market price for distressed properties in that county, that week.

We track every one of those results at AuctionScout. Our county recaps break down each week's auction: how many properties were listed vs. how many actually sold (a 53% sale rate tells a different story than 90%), average sale price (not appraised value, not Zestimate, the actual price someone paid), average discount from appraised value, and 12-week trends showing whether discounts are widening or narrowing.

That last one matters more than people realize. A widening discount means less competition and softer demand. A narrowing discount means more bidders and a hotter market. Either way, it's the kind of data that should inform your bid. Not what Zillow thinks a renovated version of the house would sell for.

Worked Example: Setting a Bid Ceiling With Auction Data

Say you're looking at a property listed for the Franklin County sheriff sale. The county appraised it at $195,000. Your MLS comps (from whatever tool you prefer) show an ARV of $220,000 after renovation.

First, pull the county recap.

You check the Franklin County recap on AuctionScout. The all-time average sale price in Franklin County is $220,745, with an average discount of 11% from appraised value. But the most recent week shows 15 properties listed, 8 sold (53% sale rate), an average sale price of $160,437, and an average discount of 35%.

That recent-week data matters more than the all-time average. It tells you that right now, properties in Franklin County are selling at a steeper discount than usual.

Next, compare recent auction sale prices for similar properties. Look at what actually sold in the last few weeks. If three-bedroom ranches in similar neighborhoods sold at auction for $140,000 to $170,000, that's your real comparable data. Not what they'd sell for on the MLS after $60,000 in renovations.

Then factor in your costs.

Your renovation estimate for this property is $45,000 (you're estimating conservatively since you likely can't inspect the interior before the sale). You've identified a potential IRS federal tax lien on the property. IRS liens survive the foreclosure sale, and the IRS has 120 days to exercise its redemption right. You'll want to budget $3,000 for a quiet title action if needed, plus carrying costs during the redemption period.

Now calculate your bid ceiling. Instead of starting from MLS ARV ($220,000) and guessing at a discount, start from what similar properties are actually selling for at auction ($155,000 average based on recent comparable auction sales). Work backward from your target profit:

• Recent comparable auction sales: ~$155,000
• Your renovation estimate: -$45,000
• Lien contingency: -$5,000
• Target profit margin (20%): ~$21,000
• Your max bid: ~$130,000

If you'd used MLS comps alone, applied a generic 25% discount to the $220,000 ARV, you'd have set your max bid at $165,000. That's $35,000 more than the auction data supports. On a single deal, that's the difference between a profitable flip and a break-even headache.

Why Average Discount Varies Wildly by County

Something that catches new investors off guard: the discount from appraised value at auction isn't consistent across Ohio. It varies wildly by county.

Look at the AuctionScout data:

Hamilton County averages a 30% discount from appraised value. Franklin and Cuyahoga both average 11%. If you're using a flat "25% below ARV" rule for every county, you're overpaying in Franklin and potentially underbidding in Hamilton.

Why? Hamilton County (Cincinnati) has different investor competition, different foreclosure volumes, and different property condition mix than Franklin County (Columbus) or Cuyahoga County (Cleveland). A one-size-fits-all discount percentage ignores all of that.

A tool that gives you a national ARV doesn't know that Hamilton County properties trade at 30 cents on the dollar while Franklin County properties trade at 89 cents. You need to know that before you bid.

When MLS Comps ARE Useful

We're not saying MLS comps are worthless. They're just the wrong tool for one specific job.

MLS comps are the right tool for estimating your exit price on a flip. After you buy at auction, renovate, and list on the MLS, you're selling into the retail market. MLS comps tell you what buyers will pay there. That's what ARV is designed for. Same goes for evaluating rental comps if you're buying to hold, or gauging whether a neighborhood is trending up or down.

The problem isn't MLS data itself. It's using retail-market comps to price a wholesale-market purchase. You wouldn't use the sticker price of a new car to decide what to bid at a salvage auto auction. Different market, different condition.

Use MLS comps for your exit. Use auction data for your entry.

AuctionScout's AI Valuation: Combining MLS Data With Auction Data

AuctionScout's AI valuation model uses MLS data and auction data together. Not one or the other. Both.

The model (built on XGBoost, a machine learning framework) blends multiple retail market value estimates with comparable auction sales from the same county. So the output accounts for retail market potential and auction market reality at the same time.

MLS-only tools answer "What is this house worth?" AuctionScout answers "What is this house likely to sell for at a sheriff sale?" Those are different questions. And the second one is the question you need answered before you set your max bid.

The Bid-Ceiling Formula

The framework is straightforward. It works because it starts from auction reality instead of retail fantasy.

Max Bid = AI Valuation - Renovation Estimate - Lien Contingency - Target Profit Margin

Start with AuctionScout's auction-aware estimated value for the property. This already factors in the auction discount, so your baseline is realistic.

Subtract your renovation estimate. Be conservative. You usually can't inspect the interior of a sheriff sale property beforehand, so assume you'll find surprises. We recommend padding whatever number you think is right by 20%.

Subtract a lien contingency. IRS federal tax liens are the big one because they survive the sale and the IRS gets 120 days to redeem. Junior liens are only extinguished if the lien holders were properly served in the foreclosure action. Budget $3,000 to $5,000 for a quiet title action if needed, plus carrying costs.

Subtract your target profit margin. Most flippers target 15-25% of ARV. Rental investors calculate based on cash-on-cash return. Whatever your number is, build it in before you bid, not after.

If the math doesn't work, don't bid. Walk away. The best deal at a sheriff sale is the one you don't overpay for.

Common Mistakes to Avoid

Using a flat discount percentage across all counties. As we showed above, Hamilton County and Franklin County are completely different markets. Check the county recap data before assuming a blanket discount rate.

Ignoring the sale rate. If only 30% of listed properties are selling in a given county, that's a buyer's market. You have more negotiating room (or at least less competition pushing prices up). If 80% are selling, expect tighter margins.

Forgetting that deposits are statutory. Under ORC 2329.211, deposits are set by appraised value: $2,000 for properties appraised at $10,000 or less, $5,000 for $10,001 to $200,000, and $10,000 for properties above $200,000. Franklin County is an exception where the plaintiff's attorney sets the deposit amount. Don't show up with the wrong amount.

Treating IRS liens as minor. If a property has an IRS federal tax lien, that lien survives the foreclosure sale. And the IRS has 120 days after the sale to exercise its right of redemption, meaning they can essentially take the property back. Factor this into your analysis and your timeline.

Skipping the county recap entirely. Even five minutes reviewing the weekly recap for your target county gives you more actionable data than hours of MLS comp analysis. Check it at auctionscout.app/recap before every sale.

Frequently Asked Questions

Can I use MLS comps at all for sheriff sale bidding?

MLS comps are useful for estimating your exit price (what you'll sell or rent the property for after renovation). But for setting your max bid at auction, you need data that reflects what distressed properties actually sell for. MLS comps reflect the retail market, not the auction market. Use them for your exit strategy, not your entry price.

How accurate is AuctionScout's AI valuation?

The model combines multiple retail value estimates with actual comparable auction sales in the same county. No valuation model is perfect, especially for properties you can't inspect. But by incorporating auction-specific data, the estimate is grounded in what properties actually trade for at sheriff sales rather than what they'd sell for in retail condition.

Why is the discount so much higher in Hamilton County than Franklin County?

Hamilton County (Cincinnati) tends to have more distressed inventory relative to buyer demand, which pushes discounts higher. Franklin County (Columbus) has a tighter market with more competition from owner-occupant buyers. The point is that you can't apply a universal discount. You need county-specific data.

Do I really need to worry about IRS liens?

Yes. IRS federal tax liens survive the sheriff sale. The IRS also has a 120-day right of redemption after the sale, meaning they can reclaim the property by reimbursing your purchase price. Not every property has an IRS lien, but when one does, it changes everything about your timeline and risk. Always check for federal tax liens before bidding.

What's the minimum bid at an Ohio sheriff sale?

On the first sale, the minimum bid is two-thirds of the appraised value. If the property doesn't sell, it goes to a second sale with no minimum bid. Second-sale properties often represent the deepest discounts. And they're where auction data becomes even more valuable than MLS comps, because MLS has nothing comparable to a no-minimum distressed sale.

Stop Guessing With MLS Comps

MLS comps answer the wrong question for sheriff sale investors. They tell you what a property would sell for in a market that doesn't apply to your purchase. The question that matters is simpler: what do properties actually sell for at auction in this county?

AuctionScout's weekly county recaps track every sheriff sale result across Ohio. How many properties sold, at what price, at what discount, and how the trends are moving week over week. Use that data alongside our AI valuation to get an auction-aware estimate for the specific property you're evaluating.

Check your county's recap at auctionscout.app/recap and see the numbers for yourself. Try AuctionScout free for 14 days, no credit card required.