Depends on what you're offering. Since we can't do trade talk, i can't really help you. A lot of people have them, but they never trade them unless you give them something everyone wants their hands on.
My little sister got these recently. She has lots of good things, but nothing great. So, I think that's the way to go. Keep collecting, and eventually you'll have something that someone wants enough to overpay. (It may take a looong time.)