Flashback cards: Upper Deck Rookie Premiere sets

Did anyone collect these?

Usually each set came with 30 cards.  Some had parallel gold or silver versions cards that fell one per set. And if you were really lucky, you could get an autograph. The odds were hard, but you could land one that were randomly inserted in the sets. Some of these sets were very popular. 2004 seems to be the one most sought after. The rookie class that year containing 3 great qb's (E.Manning, Rivers, Roethlisberger) and other great players is probably why.

But, since the loss of their NFL license, Upper Deck doesn't produce these sets anymore. So their value to me, is more now because of that.