Second hand USB to serial adaptor in excellent condition. Comes complete with drivers on a mini CD. Ideal for updating firmware on older Skywatcher and Celestron mounts that come with the serial PC cable.
A second hand Scope Sleeper dongle in very good condition. This allows a Meade LX200 GPS / Classic to be left powered on, but with the drive disabled. Ideal to sleep the scope in an observatory set-up.