I actually have one of these, but have never used it. The Xbox rep at my store says he has one, but I don't think he has used it either. Microsoft issued these to stores and Reps in case they needed to reset the hard drive because of errors and then wouldn't have to wait for a new system. Being that they are only for Xbox employees, it could be a collector's item, or it could be forgotten.

I don't think I'd spend $75 on a reset disc though.