Sounds like you've had it pretty good. I still have my original 360, but it's been repaired four times (twice for RROD). And I'm sure the only reason it's still working now is that I've played it very little since I got my PS3 three years ago.
Just in case anyone is interested; Put it up on ebay last night, if anyone in Houston is interested feel free to bid, again I'm heading down to Houston next Saturday and am more than willing to deliver it to you in person. Here's a few photos of the system and the link to the auction; http://www.ebay.com/itm/110968874985?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649