also ... if it's a refurbed xbox ... i can almost tell ya the dvd-rom drive caused the original return. my brother's system was brand new ... very first power up ... and boom, dirty disc error.

there are 3 possible drives found in the xbox. thompson (crap), phillips (good), samsung (best) ... if you can ask the guy to open up the box and power the system up, eject the dvd rom tray to see what drive is in there. you can tell just by looking at it.