On: So, I tried Dwolla

[Osiris]

Yes, sale prices can be found in public records. Just look at sites like Zillow, you can look up any property and they'll show you a history (I'm not sure how far back they go) of the sales history of the house.

[natrius → Osiris]

Whether property sales are public depends on the state you're in. Texas, for instance, doesn't make sale prices public.