Although I have Atari 8-bit experience (I got my XEGS in 1987, and a 1050 DD around 1991), I have always wanted an 800XL, as I love the look (the XEGS is too deep for my desk) and compatibility. Well, I finally bought an 800XL the other day, and today it came in the mail.
The seller said it was untested, and didn't have a power supply or any other cables (although it did have the original box, foam, and "An Introduction to the Atari Disk Operating System DOS 3" book). The system is dirty, which in my experience has always been a good sign for sellers saying it's "untested." Why? Because if it's clean, the seller likely took it apart and cleaned it, and was unable to get it working. This one is dusty and looks like it's never been opened. It also has a piece of paper taped to it which appears to be loading instructions (forgive me, it's been a while).
Although I can't test the video yet (I ordered a cable on eBay the other day), since my XEGS' is different, it does use the same power supply. The light goes on when powered on. Another very good sign. It is currently apart, with the body soaking in bleach and detergent (I always restore systems and computers with this method, so don't worry guys lol). I will then have to use Mr. Clean Magic Eraser. Then onto the dirty keyboard. Anyway, Here are several pictures of what it looked like when it I got it. Expect the after pictures soon.
Feel free to input anything at all. Odds of this working right off the bat? 85%?