How much can I get at gamestop or pawn shop for these items?

I want to sell my rockband microphone, wii les paul controller, and my Guitar Hero III and Aerosmith for the wii. I am going to Las Vegas in 2 weeks, and I need the money, so if you can tell me how muc I can get for any of these at gamestop or a pawnshop, I would really appreciate it. I also have a leather UNIK duster, if anyone could tell me how much I could get for that at a pawn shop.