Amazon offers the Netis 802.11ac Wireless USB 3.0 Adapter, model no. WF2190, for $35.99. Clip the $10 off coupon on the product page to cut the price to $25.99. With free shipping, that's tied with our Cyber Monday week mention and the lowest total price we could find now by $10. (It's also a very low price for an 802.11ac WiFi adapter.) It's equipped with two dual band external 5dBi antennas.