What age are we talking? There's a huge market for Twencen things. A friend of mine collects Twencen memorobilia so I can give you directions to the best places for selling those. There are antique dealers as well, for things that are older. If you actually want pawn shops, those are in Downtown and they're usually pretty shocking dodgy.
Although you'll need a cred chip to get the money from any of those places. There isn't any cash here.