I think they are cheap because they have been dismissed as a modern issue, but believe that signed ones represent a tremendous value.As SGC doesn't grade autos, the only viable option is PSA, but for the set I collect it's a moot point- they have the best holder for this particular issue.As far as what series is better, I'll agree with Al C. on the other thread that the Great Moments is the nicest of all of their issues. They resemble T3 Turkey Reds, and 70 of them were possible to have been signed. The first 60 are easy, the last 10 get progressively tougher until you hit the one that is nearly impossible, Richie Ashburn.Some of my favorites from this set: