I would generally say that it probably is better than one in 25,000 - but the odds were never publically disclosed. If a case has 720 packs - I would guess that the odds are somewhere close to 1 in 2,000 or 1 in 2,500.
He autographed 2,500 of them.
Let's put it like this. We don't know UD's production numbers OR the odds for that year.
However, if you were to assume that UD produced 10,000 low-number cases that year - that would put the odds at precisely on in 2,880 packs.
At the end of the day - the markets are overall pretty efficient. Most 1992 cases do not have an auto - that is known. How many cases - it's a crapshoot, but buying a case is a fun exercise - but not a known money-maker.
Thanks for the replies! I wasnt really looking to make money, just have some fun destroying a bit of cheap wax (or foil in this case). On the other hand, I'm not sure I'd know what to do with 10,800 random 1992 UD cards