4, 5, 6, L, N, Q, R at 14th St.-Union Sq. Stocked floor-to-ceiling with limited-edition new and "lightly worn" sneakers, the store lets the shelves—brimming with busy kicks in vibrant colors ...

Deion Sanders and Nike got back together again to release the NFL Hall of Famer's signature Air Diamond Turf sneakers.

N, R at 8th St.-NYU; 6 at Astor Pl. Hang out for a while at Flight Club's nondescript Greene Street location and it's easy to understand why this concept store is giving eBay a run for its money.