SkyCommander DSC computer. Includes encoders (2048 steps on alt/dec axis, 4000 on Az/RA), cables, instruction manual, and all hardware for mounting on a Celestar (brackets, encoder-to-axis bolts, dec hub cover, and so on). Everything is in working order, but I really never used it, so I can't comment on performance. Encoder-to-SkyCommander wiring (connectors on both ends) is home-brew, so it's more functional than pretty.
I'm about to head out of town for the weekend, so please don't expect a response to questions until Sunday night/Monday.
$300, CONUS shipping included.