+1 to the above, however, in all cases, with a little work, you can get the phone back to stock. I paid $320 outright for my Incredible in the forums, with 16gb msd, car charger, and 5 cases (sold Storm 2 for $180), but I think I got a steal, as the person switched carriers and needed cash for ETF. Either way, math should work out to be $300 to $350, which would be a reasonable cost. It's definately worth that amount, especially if you do not want to waste the upgrade, like me.
Post your phone on Crackberry, you should be able to sell it fairly quickly.