Potomac Collector

Corporate Boulevard buyer and seller in Rockville dealing sports cards, Pokemon and comics, open six full days plus Sunday afternoons.

Potomac Collector operates out of Suite 200 at 9200 Corporate Boulevard, on the western side of Rockville near the Shady Grove corridor. The setting is an office park rather than a retail strip, which puts off exactly the wrong people, because what happens inside is a working collectibles trade rather than a shelf-stocking operation.

Buying is a genuine focus here, not an afterthought. The shop actively purchases trading cards, sports cards, Pokemon and comic books, which means inventory turns over based on what walks through the door rather than what a distributor allocated. For someone sitting on an inherited collection or thinning a personal one, that changes the conversation: you are dealing with a buyer who wants the material, not a retailer doing you a favor.

The sports side covers the expected ground across baseball, football and basketball, with vintage and graded material in the mix, and Pokemon rounds out the trading card game presence. Because turnover is collection-driven, calling ahead about a specific player or set is worth the two minutes.

Hours are generous by DMV card shop standards. The shop runs 10AM to 6PM Monday through Saturday and adds a 10AM to 4PM Sunday window, so unlike much of the Rockville and Montgomery County scene there is no dark day in the week. Its Google reviews are few in number but uniformly positive, which reflects a smaller, quieter operation rather than a low-traffic one.

Corporate Boulevard has ample surface parking and sits close to I-270, making it a straightforward stop if you are already moving between Rockville and Gaithersburg. Look for Suite 200 rather than trying to spot a storefront sign from the road.