nice mate, when i was real little my cousin had like the base set of those - i was so envious because there were only really a few auto's an gu's out then and we knew nothing about them so we judged the cards based on how cool they looked and the players.
we thought an MJ common was worth like at least 20 bucks, and he had all these transparent glass looking cards in immaculate condition. pretty cool.
Ebay - single bid auction! Which was really surprising seeing the last camby plate that went up had a lot of bids and ended up selling for around $70 which surprised me
Thanks for all the other comments as well, it's great to see the value is these super-rare pre GU and Auto cards
that is a great pc pick up.....definitely worth getting pumped about. Cards /20 these days can be hard enough to track down......those early ones are like hens teeth. Congrats and good luck with the regular version