No power supply, but the rest of it (apart from the instructions) seems to be there - the main unit with the disk drive, and the adapter thing that allows you to fit it into the cartridge slot on the console, and it's boxed. Box says: "UFO Super Drive - Hyper Version. 18 mega-bit RAM on board, 32 mega-bit RAM expandable. I/O port for PC computer. Workable on SFC & SNES console" Unit says "UFO Super Drive Pro 6 Hyper Version" I have no idea if this still works (it worked when I last used it years ago) and have no way of testing it (no power supply, no SNES, no floppy discs) - is this likely to be worth anything to anyone, or is it something to dump?
UFO 6 are very very old and these days aren't only eclipsed by inexpensive GDSF7s but also the PowerPak, Everdrive etc. A fair price would be around $50. To the right person it might fetch closer to $100 if you can sell them on the condition (if it's in good condition) and scarcity of the box. A loose UFO 6 in very poor condition would be worth around $20.