I just bought an MX7C, so I'm selling my SAC7B. This is one of the earliest ones, with the Logitech chip and the very funky bright blue paint job, but it works just fine. This is the Peltier-cooled version, which sells new for $499. It comes with the original software and all the cables. This one requires both a USB connection and a parallel port connection. If you don't have a parallel port connection, I have a parallel-to-USB converter I can toss in for a little extra $. This is a good way to get started in long-exposure CCD imaging on the cheap. For more info, you can look it up at the SAC-Imaging website. SOLD! THANKS!