I bought a nice Morgan toner in an NGC slab not too long ago that turned out to be an unattributed Top 100 VAM. Chris
I don't know if you would call this cherrypicking but I was at a show once and bought a Great Britain Whitman Shilling folder and when I took it home and opened it there were six coins in there.
Cherrypicking by definition is knowingly looking and finding an item (doesn't necessarily have to be a coin) that is worth more than what the seller is selling it for. You can't cherrypick something by accident. Either you know it or you don't. If you find it after the fact then thats just pure luck, not cherrypicking.