I've had terrible luck with Fallout 3/NV for the PS3 as far as bugs and glitches go that make the game unplayable. Couldn't get further than 20 minutes into New Vegas without the game freezing. This is a very common issue. You should look into before buying it.
Never played Fallout 3, but I've heard great things and it's only ten bucks on PS3.
Hmmm...
Good to know. Thank you.