For its newsletter subscribers only, Newegg offers the TP-LINK 802.11n N300 High Gain Wireless USB 2.0 Adapter, model no. TL-WN822N, for $19.99. Coupon code "EMCWVXP58" drops it to $14.99. With free shipping, that's the lowest total price we could find by $5. It features dual 3dBi omni-directional antennas, a maximum data transfer rate of 300Mbps, and 64-bit/128-bit/152-bit WEP/WPA/WPA2/PSK support. Coupon ends December 12.