how much money can you get by trading in a 80gig PS3

[Neoraf]

I think it's a good decision.
If he can't afford both, the 360 is the way to go.

So many good games.

Tell him to try:

CRACKDOWN!
Mass Effect
Lost Odyssey
Braid
Kameo
Gears of War 1-2
Banjo-Kazooie N&B
Fable 2 !!!
Halo3
Viva Pinata!!!
Dead Rising
Forza 2
Dead or Alive 4

...overwhelming.