2026 MLB Topps Heritage Sealed Retail Mega Box 
Sealed/New

Featuring the 1977 Topps Design
What's Inside the Box
  • Total Cards: Approximately 136 cards total (8 cards per pack \ 17 packs).
  • Base Set: Features a 400-card base set including subsets like League Leaders, Record Breakers, Quad Rookies, and "Turn Back the Clock".
  • Short Prints (SP): The 100 base card short prints (SP) are scattered throughout, with an average of four SPs per Mega Box. 
Guaranteed Mega Box Exclusives
On average, each factory-sealed box contains: 
  • 4 Base Card Red Bordered Parallels
  • 4 Base Chrome Variations (Short Prints or numbered parallels)
  • 4 Base Chrome Silver Sparkle Parallels
  • 1 Insert Card (Look for sets like Ready and Action!, The Enterprise, and Raw Power) 
Chase Elements
While Mega Boxes are predominantly for set builders, you can still hunt for rare chase hits: 
  • Parallels: Deckle Edge cards and Color of the Year (Heritage Orange, numbered to /77).
  • Autographs & Relics: Look for classic Real One Autographs (and the red ink versions numbered to /77), Chrome Autographs, and Clubhouse Collection memorabilia relics.
  • Image Variations: Special image swaps including All-Star logos, throwback jerseys, and Black & White images