Pokemon Mystery Slab (PSA/CGC/Beckett Guaranteed!).
Lots of vintage from base set through E-series, and modern from sun & moon through scarlet & violet.
Slabs range in value from $20 - $200
Average slab is $40.
Chase: PSA 7 Base Set Blastoise, PSA 10 Rainbow Pikachu
All slabs are pre-packaged and will be chosen at random.