1959 High Numbers are underrated to begin with, then add in the fact that centering is often nightmarishly bad (and the Mantle All-Star is no exception) and it's Mantle and this is one of the few Mantle cards from the 1950's that has a lot of room to grow. Compared to the triple printed 1958 Mantle All-Star this is much harder to find in decent grade, yet it sells for about the same price!