I don't know, but the selling price is a matter of public record.
If you're curious about the selling price, you can check it in a couple of ways. Several counties have their PVA online so you can look up information about various houses. This normally includes date of last sale and the selling price. Also, the newspaper by me includes property transfers in the public records section on a regular basis (I think maybe once a week?) and it includes the address, name of seller, name of buyer, and the recorded selling price.