How much should i sell my ps2 for?

i have around 20 to 30 games and wanting to sell them but not sure what to sell it for i was going to sell the ps2 for 50.00 and the games 5.00 each but i read some other things and rethought it over and decided maybe around 100.00 for it all together it is a used ps2 and the games are also used...i am also selling 4 gta games for 10.00 but san andreas has been marked nonsellable in stores so i might sell it for 20.00> what should i do????