http://denver.craigslist.org/
I've been able to re-appropriate some perfectly good junk that way. Look at the list of cities/states on the right when you get there. You can post in more than one region. You could also try FTEs regular classifieds, reach more people interested in Trucks.

Not to dis your truck in any way, but have you looked at ads for similar trucks to get some idea of current value? Salvage is not a very good option, you'll get pennies on the dollar for that new engine. If you are going to give it away, at least give it to someone you like! LOL

I don't know what your situation is, but I've managed to keep mine 12 to 14 years (so long I forget). My wife and I combined have been through maybe 12 grocery getters. You can always find another car, a good truck is difficult to replace.

Good luck, Mike