The spread everybody quotes is the one before the contract seller's number gets confirmed

Still saving, never closed a deal, so take this for what it is from someone who has been studying this market from the outside for about eighteen months now. What I will say is that from watching deals move through the Cleveland pipeline, the ARV disagreement almost always lives in the comp radius. The contract seller is pulling a half-mile, the buyer's agent is pulling a quarter-mile, and in a market like Garfield Heights where one block genuinely changes the number by twenty or thirty thousand, both of them can claim they are right. The $218k versus $240k spread in the original post is not an exotic scenario, that is basically every third deal I have seen discussed at meetups where the post-close debrief gets honest.

The part that I do not think gets said enough is what happens to the dispo person's reputation when the buyer who closes is the one who missed something. Because that buyer is not gone. They come back to the next blast, they pull your next number harder, they tell their partner what happened, and slowly the buyers who do their own underwriting start treating your list the way I treat certain wholesalers I have watched operate in this market: open the email, assume the ARV is padded by ten percent, and work backwards from there. That is a slow tax on every future deal you move. So what is your comp source when you are doing the independent verification, and are you pulling it yourself or are you paying someone with MLS access to pull it?

The assumption doing the most work is that the contract seller's ARV was derived the same way your buyers will derive it. It almost never is. Sellers pull optimistic comps or weight recent outliers. Buyers with a cash-and-flip discipline pull the closest three sales by square footage and condition and stop there. That gap, before anyone signs a JV agreement, is where the deal either holds or falls apart quietly... And I am not allowed to use that word. The gap is where the deal holds or collapses, and you are right that the dispo operator is the only one in the chain who still has a clean reason to stop and check.

On process: the minimum defensible standard is running your own comps independently before you agree to a dispo fee, not after. Pull the same data your buyers will pull. If your ARV lands more than roughly five percent below the seller's number, you have a structural problem before the blast goes out. At that point you need either a repriced contract or a pass.

The JV agreement point is where I see most dispo operators leave themselves exposed. A lot of JV language fixes the buyer's fee to the seller's stated spread with no repricing mechanism. That means if your comps come in low and the seller will not move, you are either marketing something you know is mispriced or walking away from a relationship and a fee. That is the conversation to have before the agreement is signed, not after you have run your own comps and found the problem.

The unmentioned risk here is reputational. If you move mispriced paper to your buyer list, the buyers who catch it and pass will remember it. A buyer list is an asset that erodes with every deal that wastes their time.

What does your current JV template say about repricing, and does the contract seller sign off on your comps as a condition of the arrangement going live?