For sports cards, I mostly focus on minor league sets, for both my locol AHL franchise, and for ALL of the Boston Red Sox farm teams. You're quite right that having a future major leaguer in a set increases a sets value, but it's not the only factor. Some sets are produced in greater or lesser quantities than others, some manufacturers are more desireable than others, some sets were available for purchase from team gift shops while others were only available as giveaways or through local businesses (the Pawtucket Red Sox Dunkin' Donuts sets, for example), etc. And of course, the ultimate factor as with all card sets - whether anyone actually wanted it at the time it was released, which determines it's future scarcity. For example, I have well over half of all the Pawtucket Red Sox sets ever made, but there are a few that I've never seen or even met anyone who actually has, like the TCMA 1977 set, despite the teams sustained popularity.
- Wil
Obsessed with Springfield MA Hockey and the history of the AHL. Always in search of cards & memorabilia related to Spfld Indians, Kings, Falcons, Thunderbirds, finding the 2004 and 2007 Choice Pawtucket Red Sox team sets.