For its newsletter subscribers only, newegg offers the TRENDnet 802.11n Wireless-N USB Dual Band Adapter, model no. TEW-684UB, for $49.99. Coupon code "EMCKCKE23" drops it to $39.99. With free shipping, that's the lowest total price we could find by $15. This adapter features dual bands, up to 450Mbps data rates, USB 2.0 connectivity, and more.