Whats the secret?
There is no real secret to finding supers either. I’ve found supers:
1) on the pegs at the opening of the store aka door warming ,
2) on the pegs in the middle of the day,
3) in a case off a pallet,
4) in a case that I talked a clerk into getting from the back,
5) Out of a dump bin that I found untouched,
6) Out of a dump bin that I filled myself,
7) Out of a dump bin that has been out on the floor,
8) out from in front of another collector,
9) and Mrs. Keck has pulled one twice when we were looking together.
The best way to spot a super? Do some research, then go hunt as often as possible/realistic. Be persistent and you’ll find one soon enough.