[thinkharderdev]

> Then it's vulnerable to malicious buyers putting in fake bids

TBH that seems like the easiest issue to solve. For instance, to make an unsolicited bid you have to escrow %20 of the price. If the owner chooses to updated the declared value, you get that back. But if they choose to sell and you walk away (or don't actually have the other %80 to complete the sale) then you forfeit that to the owner. Or you can even disincentivize "malicious" offers more by saying that if the owner chooses to update the declared value then you still forfeit the escrowed cash but it goes to offsetting the increased tax bill for the current owner.