Newegg offers the Rosewill 802.11ac Dual Band AC1200 Wireless Adapter, model no. RNX-AC1200PCE, for $49.99. Coupon code "EMCEFEJ45" cuts it to $29.99. With free shipping, that's the lowest total price we could find by $24. It features a data transfer rate of up to 300 and 867Mbps, 64-bit WEP, 128-bit WEP, WPA2, and WPA encryption. Deal ends January 11.