Dataflyer XDS on eBayUnit is like new, it's seen about 30 hours of use.
Expansion Systems
Dataflyer XDS for Amiga A600, A1200
Users the 2.5" IDE header to connect an external 3.5" hard drive enclosure using a ribbon cable. Power is drawn from the floppy header. Will work in conjunction with a w.5" hard disk in your A1200 / A600.
Autoboots and mounts by the Kickstart ROM note: the A600 must have Kickstart v37.350
Source: Amiga Hardware Datbase