Depends on the definition of best.
I was going through a box of miscellaneous automotive PCs and pulled the last card I needed to complete the 1962 Racing Pictorial Daytona International Speedway postcard set, which is basically the first NASCAR set. Joe Weatherly (a NASCAR HOFer):
Really, really HTF. Not very valuable, of course, but finding it at random for $0.50, well, that was a heck of a stroke of luck. As it turned out, there is still one more card I need to finish the set, Buck and Buddy Baker. Been looking for that one for about two years.