74 Topps -Mike Schmidt. Took a few years of waffling before I found one at a price I liked. Not a bad thing as it became the last one needed when his cards were at their peak. So I saved a bunch by waiting.
Most other years, 78-80 I don't really recall. Usually some common, and at the time most dealers had big boxes of commons you could go through. So it was usually more like the last 10-20 cards all bought at once.
My 88 topps set it was Canseco. Also took a couple years
Too "expensive" to find in flea market lots, but too cheap for a dealer to give it space in the case. Or bother digging it out of the big box in back.
I really can't recall which 48 Bowman was the last. I think one of the SPs but not a star.
Steve B