[Hertston]

You need to read the mission requirements. To get the division level cards such as Clemente, you need to complete the team level MISSIONS not just collect the cards. Hence Stargell, for example, has relatively little value beyond that of a very average '100' card but getting him is not the primary reason to do the mission. Likewise, you need all the division level missions completed and not just purchased cards to get Koufax and Speaker at the top of the tree. The prices of everything feeding into that are largely determined by that objective.

If it's any consolation, you are free to sell any FH3 cards you wish once you have completed the mission that obtains them.