How hard is it to find certain games in this market? I plan to check out a few pawn shops and flea markets in the coming weeks to see about scoring a few NES games for my system which still thankfully works. I'm also looking to get two new controllers because the one I have now is definately glitchy, when I was playing TMNT 3 The Manhattan Project or TMNT 2 The Arcade Game the sprites wouldn't react occasionally when I hit the buttons and sometimes the game would pause without me pressing start. (Unless that's a sign of either malfunctioning carts or system? I'm not up on what to do if anything does happen, does Nintendo still offer repairs to game carts or systems as old as the NES?) How can you be guaranteed that the carts you pick up from said places are going to be 100% or at least 85% good? Any advice would be welcome, and should I pick up a second NES in case the first one does crap out on me?