I'm still on my 2nd original XBOX, and had my disk drive go out (even though it was the Samsung). I opened it up and of course voided the warranty. Even so, I sold it in broke condition on ebay for $80. You could do one of 2 things. Buy a new one for $60 or replace the drive... which is pretty easy, even if you haven't seen a tutorial. If you can find an xbox for really cheap I'd try relacing the disk drive to avoid having to transfer all your saves to a memory card, then to another xbox.

Hurray! Microsoft makes an unreliable product, but we keep coming back. Although it has always been a lot cheaper to replace an original xbox vs. a 360. Wasn't the original $175, by this time in it's life span?