Your controllers and memory card will work perfectly fine on the PS2, as should those games. No need to sell anything.
But, if you do intend to sell the games, you will be better off doing it yourself via eBay, free online classifieds or even just put up notices of having the games for sale locally on public notice boards. You will get nothing for them from pawn shops or stores that sell used games (some don't even accept used original PlayStation games any more).