Newegg offers the Edimax 802.11ac Wireless Add-On Station / Access Point, model no. EW-7288APC, for $24.99. Coupon code "EMCEHEF35" cuts it to $9.99. With free shipping, that's tied with last month's mention as the lowest total price we've seen. (It's a current best by $15.) It adds an extra 5GHz WiFi network into your existing WiFi environment and supports WEP 64-/128-bit, WPA, and WPA2 encryption.