Almost 10 years old...
My wife and I brought out the old Sega Dreamcast and played some games on it two days ago. It still works like a, erm, dream after all these years. Not bad for a game system that's celebrating its 10th birthday on 9/9/2009.
I own a PS3 as well and have no problems with it at all. It is my media computer for about 50% of the time and my game system for the other 50%, so it sees a lot of usage.