Newegg offers the TP-Link Archer 802.11ac AC1200 High Gain Wireless USB Adapter, model no. T4UH, for $38.99. Coupon code "EMCEKEG38" cuts that to $29.99. With free shipping, that's the lowest total price we could find by $8. It features dual omni-directional antennas, a maximum data transfer rate of 867Mbps, and 64-bit/128-bit/152-bit WEP, WPA, WPA2, and PSK support. Deal ends June 4.