400-card Retail-Exclusive Blue Base Set. Collect all four levels of the base set, which get increasingly more-rare by the level - Base Concourse, Base Premier Level, Base Courtside and Base Mezzanine. Find retail-exclusive inserts, autographs, and parallels with each SKU offering its own exclusive content. Blaster Box Packaging: 4 cards per pack, 6 packs per box, 20 boxes per case. 6 Inserts or Prizms per box on average.