Anybody know anything about these? I found a used one at a local astro shop. It has been rebuilt including the mount. What should I look for and what kind of questions should I ask If I am interested. At $750 asking price it seems to me like a new scope would be a better deal, unless these were some kind of special.

Here is the URL. Check under the used Equip block.
http://www.infobtainers.com/
I have been to this shop a couple of times. They seem like straight up kinda guys. You gotta love an astronomy shop that is open 4pm to midnight, and will let you take anything you want outside to look through.
Keith CSN