If you can find a running XL600 for under 1500 buy it, you can resell them for more than that easily.
Wow, that makes me feel really good. I picked up this beast for $500 from a friend, and apparently it was a great deal!
Rode it home (about 100 miles), tightened the chain, threw on a new tire, and now she's my daily ride. Oh, by the way, this is my FIRST bike, and I love it!