I think they have plenty of value left. I just bought two used 8 gig iPhones off of ebay. Reason 1 is because I do not have 3g coverage where I live in Georgia and do not expect it for some time. Reason two is that unless someone gets a supply of 3g iPhones that do not require you to sign away your first born (in the us) I want the freedom of a unlocked phone. Prices may dip for a while after the 3g launch but I do not expect it to last long.