I've known very little about the 1951 Topps set. But one thing I DO know is that the Billy Pierce card has been very hard for me to find. Especially at a decent price.
I really have never looked into the '51 set. Collecting Orioles meant that I sought out cards as far back as the '54 Topps and Bowman sets. Anything earlier than that was just 'cool old stuff' that I liked to look at but never knew much about.