These seems like major bargains for a used 8X8 midi interface. I've seen them as low as $50. The big question- does it have drivers for, and will it work with Windows XP?
You might check for further info at the MOTU user's group site (Unicornation.com). It's been down recently due to a web hosting issue (host went out of business without warning) but it should be up soon. You could also try MOTU but good luck getting through or getting a response!