Ending today, Newegg offers the TP-Link T6E AC1300 Dual-Band 802.11ac Wireless PCI Express Adapter for $49.99. Coupon code "EMCFFGT52" cuts it to $34.99. (Amazon charges the same for Prime members.) With free shipping, that's $5 under our August mention, the best price we've seen, and a low by $15. It features data transfer speeds of 867MB/s at 5GHz or 400MB/s at 2.4GHz.