How much $ will i get from game stop if i trade in a slim ps2,10 games,memorycard,wirless and regular controll

i just bought a silver slim ps2 i have 10 games
1)hitman blood money
2)hitman silent assasin
3)hitman contracts
4)nba live 2008
5)madden 2008
6)grand theft auto 3
7)grand theft auto vice city
8)grand theft auto san andreas
9)tony hawks proving grounds
10)spiderman 3

i have a 16mb memory card

a wirless controller
a regular controller that came with console

how much will i get for all of this

from gamestop
and i dont wanna use ebay cuz im only 14

i want money so what should i do and what would game crazy offer to

please help me