Chicagoland's Newest Sports Cards Shop! Mark's Card Shop is located in Downtown Downers Grove at 914 Curtiss St (across the street from the Post Office on the corner of Curtiss and Washington) The shop features a large selection of sports cards from almost every sport (NBA, NFL, MLB, NHL, Soccer, and UFC). Whether you're searching the bargain bins to find your next treasure or you're in the market for a high end graded card, we have a large collection for you to look through. We also carry a large selection of both retail and hobby wax (sealed boxes). For the Pokemon fans out there, we also have you covered! We will have a full showcase of singles, packs, booster boxes, and ETB's! Mark's Card Shop also carries unique collectibles that make perfect gifts.