How much would ps2 games be worth now?

my brother got kicked out( hell yea!) and i was throwing his stuff away the other day, when i came across a pile of ps2 games and the cases. I thought about selling them so i could get a laptop and stop using this pitiful thing america calls a desktop. how much would they be worth? there are like 20 of them so im not gonna name them. but if i were to sell them where could i take them to get the most mone yfor them. the laptop cost 300 dollars, and my mom definitely wont get that for me, so could somebody give me some pointers?