As the official on-court apparel provider, Nike's site is the best for high-performance "Authentic" grade jerseys.
The best website to buy NBA jerseys depends on whether you value guaranteed authenticity, retro styles, or a lower price point. For current, officially licensed gear, the Official NBA Store and its partner Fanatics are the industry standards. Top Sites for Official & Authentic Jerseys
The primary source for the widest selection of current players, City Edition jerseys, and custom options.