The Astronomical Society of Kansas City is selling our SBIG ST4 camera complete with all the normal cables, software, instruction manuals, etc. for $550 or best offer. Shipping paid in US. I am told that this unit has the "enhanced chip", but I'm not at all sure what that means. But it works fine, and needs a good home. Contact me with an offer or questions, and I'll try to get the answers for you. On behalf of the club, we fully guarantee (money back) that this unit works fine. Dave Hudgins , President, Astronomical Society of Kansas City.