Prices are going up and will continue going up. If you want to buy a house, buy it now, don't wait for 2 years. The rates are low, take advantage of it. I'm happy to assist you with the purchase and give you referral for great lenders.
Unfortunately the MLS does not maintain data that far back. I know a client of mine paid an appraiser to do a similar cost basis calculation. I am not sure what it cost. Maybe a Title Company could also provide the information, I am not sure. I hope that helps.