[Cozumeleno]

Finding a consistent multiplier for the backs in something like T207 is not easy because it is one of the rarer tobacco sets in comparison with things like T205 and T206.

Also keep in mind that not every subject is on every back. For example, some players have Recruit or Napoleon backs. Other players have Broadleaf and Cycle backs. But those groups don't intermingle. For example, a player with a Recruit back will not also have a Cycle back. There are also the Anonymous and Red Cross backs as well. I believe Anonymous cards can be on players in either of the two groups while Red Cross is limited to those with Broadleaf/Cycle backs.

In terms of rarity, Recruit is the easiest while Red Cross is the toughest. Others are somewhere in the middle. Other than Red Cross, Napoleons are maybe the ones I see the least of.