Newegg offers the D-Link AC1900 802.11ac Dual Band Wireless USB 3.0 Adapter, model no. DWA-192, for $69.99. Coupon code "EMCEHEH42" cuts it to $39.99. With free shipping, that's $11 under our mention from December and the lowest total price we've seen. (It's a current low by $50.) It features a data transfer rate of up to 600Mbps and 1300Mbps. Deal ends March 9.