Gotta agree with the above, unless you're pretty experienced with things mechanical, just unfamiliar with Contenders and you can't find anyone to go with you. If you know what to look for when looking at overstressed metal, and have a good glass, you can figure most of it out. Contenders aren't very complicated. Get a parts list or exploded view and if you're good with guns you can figure it out. Now, that said, there are or can be "hidden snakes" so if you're not familiar look hard and long especially if the price seems too good to be true. My experience lately has been that gun show prices aren't so great, so if you see a $100 frame, I'd run away. Look real close at any of the frames (Ed's usually got used Contender frames for a little over $175 so that's you're benchmark).
Helicopter Bill