Meritline offers the TP-LINK 802.11n Wireless USB 2.0 Adapter, model no. TL-WN422G, for $14.99. Coupon code "MLC117AN" cuts it to $7.99. With free shipping, that's the lowest total price we could find by $7. It features a 4dBi omni-directional antenna, maximum data transfer rate of 54Mbps, and support for 64/128/256-bit WEP.