It will take a little bit of digging, but if you go on okcountyrecords, and find deeds in the same township and range you’re in, or close by, you can figure out the sale price by looking at the documentary stamps. They are priced at $1.50 per thousand dollars of sale price. so, if you find a deed where the documentary stamps, shown at the top of the deed, shows $4.50, you know it was sold for $3000.00.