It depends what you want it for. If your after a PS3 because you want a current gen gaming device then id opt for a new xbox360 for similiar price rather than a 2nd hand PS3.
my only real problem with the ps3 has been that it has nothing to draw me to it
it still doesnt really everything thats multi plat will be on the 360
ive always had all the consoles though but back then things were hardly ever multi platform