Well, I'm not selling it, that's for sure! I'm not too bothered about the possibility of it dying right now, but I was considering upgrading it to replace the CD drive with an optibay and 32GB SSD to boot OS X, and possibly upgrade it from 3-4GB RAM. These are not huge upgrades, but in total it would be about $50-60 and i'm not sure I would want to spend that kind of money on a machine that may die the week after I get all the upgrades.

That's really the only reason I would have to worry, but I honestly may leave it as-is, its not too bad performance wise, better than expected.

Also TheMayGuy, Thanks for the info. I'll check under the RAM covers, but i've already disassembled it once, I don't really feel like totally tearing it down just to see if the MoBo had been replaced. My money would be against it though, the friend i got it from had OS X 10.5 Leopard on it, and had never upgraded it beyond stock, so I don't think he had the MoBo replaced. He's not too computer-savvy, so I can't ask him.