Under valued (or underappreciated autographs)

[travrosty]

I think those two examples are good examples of autographs whose price doesn't seem to match the achievement of the players.

but i dont think that necessarily makes them a better investment than other autographs of hof'ers whose price is commensurate with their achivement simply by the observation that these players are dead, their numbers won't change, and their popularity probably won't either.

If their autographs haven't climbed up to what their numbers would suggest they should be at by now, several decades after their death, they probably won't in the future either.