Have you heard of the Topps "Living Set"?
Introduced at the beginning of this season, Topps has created a whole new concept in collecting. They have put together a set that has will have no end and is not tied to any specific season or era. Rather, it's a cross-generational brand that will issue one card for every player -- unless that player changes teams. In other words, this set will continue to grow in size seemingly forever with only one card per player/per team. For instance, ten years from now they will still be adding to the set, and assuming a player like Clayton Kershaw never changes teams, you will only find one card of him available.
