They jumped for $303 to $850 in one bid less than an hour before the auction ended! With all the shill bidding going on lately I don't buy it.
Also, the 123 cards are
archived here (or at least a bunch are) and reproductions can be purchased for $1 per card IIRC.
Who's to say there are any 121 cards in there beyond the standard factory set ?
The same seller also has a
USM-118 cardmatic for sale. I wonder what it will go for ?