1954 NY Journal-American Johnny Antonelli.
Not a particularly desirable set and I am not a collector of this card specifically, but have an Antonelli collection and this card isn't particularly abundant, so I usually bid if it is affordable.
I also have 3 copies of the regionally issued 1994 Nabisco All-Star Legends Paul Blair. I had a fourth but traded it to a board member for a 1976 English Chicken bucket lid of Blair. Single copies of this card only become available every 3 to 5 years. So, when they do, they usually go for over $100.
3 and 6 aren't exactly large numbers, but given the rarity of the cards appearances on the open market, I consider myself lucky to have as many copies as I do.