Grand Slam Sports Cards is located at 2108 Caldwell Blvd Suite 113 in Nampa, Idaho — a family-owned hobby shop run by two lifelong collectors who built this place for people who love the hobby as much as they do. No corporate vibe, no upselling. Just a well-stocked shop with fair prices and people who actually know cards.
We carry sports cards, hobby boxes, graded slabs, and singles from all the major brands. Whether you are chasing a rookie card, building a set, or just want to rip a box on a Saturday, we have you covered.
Nampa's Favorite Card Shop
What We Carry
Sports Card Brands
Topps, Bowman, Panini, Prizm, Mosaic, Select, Optic, and Fanatics. We stock football, baseball, basketball, hockey, and soccer cards across hobby boxes, blaster boxes, and hanger packs.
Graded Slabs
PSA, BGS, and SGC graded cards across all major sports. Authenticated, condition-evaluated, and ready for your collection or portfolio.
Singles
Raw and graded singles across all sports and sets. Inventory rotates constantly — follow us on Instagram @grand_slam_idaho for the latest arrivals.
Supplies
Sleeves, top loaders, binders, and storage boxes to keep your collection protected.
Buy, Sell & Trade in Nampa
Have cards to sell? Bring them in. We offer fair cash offers based on current market pricing, store credit toward new product, and card-for-card trades. We buy football, baseball, basketball, hockey, and soccer cards — raw singles, graded slabs, sealed product, and bulk lots.
Large collection? Call ahead so we can set aside time to go through everything properly.
