Newegg offers the TP-Link AC1200 802.11ac Wireless Range Extender for $79.99. Apply coupon code "0425TECRNE97" to drop the price to $39.99. (Amazon offers it for the same price.) With free shipping, that's tied with last month's mention and the lowest price we've seen. (It's also the best deal we could find today by $25.) Features include speeds of up to 1.2Gb/s, a range of up to 10,000 square feet, and two dual-band antennas.