But it wasn’t the Mantle rookie (the 1951 Bowman). It was the 1952 Topps, the holy grail of the ... The most recent sale of any 2.5, one graded by PSA, sold for $45,900 on March 6.

Topps has been making baseball cards since 1952, the collector's market is willing to pay top dollar for some of them.

Since the adoption of card grading in the early 1990s, many collectors have utilized numerical grades as a representation of ...