I don't remember what I paid for the 15 BTC I bought early in 2011, but it was very little, probably about $1USD per coin, and was purchased to do some testing for a web client. He scratched the project and I left the coins in a wallet on my hard drive. Didn't give 'em much thought at all until this last week and just for grins, decided to see if I could restore that wallet. Copied the wallet to my laptop, where I installed the updated program and the coins were intact. Nice chunk of change now!