Buy.com offers the TRENDnet 802.11n Wireless-N USB Dual Band Adapter, model no. TEW-684UB, for $28.50 with free shipping. That’s the lowest total price we could find by a buck, although it was $4 less four weeks ago. This adapter features dual bands, up to 450Mbps data rates, USB 2.0 connectivity, and more.

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