Newegg offers the Trendnet 802.11ac Wireless Easy-Upgrader, model no. TEW-820AP, for $34.99. Coupon code "EMCARKR35" cuts it to $19.99. With free shipping, that's the lowest total price we could find by $10. This device connects to your current router to give you 802.11ac wireless capabilities. Coupon expires April 20.