I agree with dbroockerd on this one. If you get the chance, I would grab a Mariano first. Looking at only the Beckett listings, he only has just over 200 cards autographed. Not 200 TOTAL cards, but 200+ card issues autographed. I don't know the overall number of autographed cards of his. I hope that made sense!
On the other hand, Pujols has over 1,000 card issues that were autographed. Again, not sure on the total number of actual autographed cards. If you have the money now, I'd grab a Mariano as he's signed so little already while active, I can't imagine he'll go into a flurry anytime soon and over time anyway, they will be harder to find while the availability of Pujols, with more signings to come obviously, will take longer before they dry up.
Just my $.02 with nothing to support my opinion other than looking to see the number of card issues produced with autographs.
On the other hand, Pujols has over 1,000 card issues that were autographed. Again, not sure on the total number of actual autographed cards. If you have the money now, I'd grab a Mariano as he's signed so little already while active, I can't imagine he'll go into a flurry anytime soon and over time anyway, they will be harder to find while the availability of Pujols, with more signings to come obviously, will take longer before they dry up.
Just my $.02 with nothing to support my opinion other than looking to see the number of card issues produced with autographs.