Newegg offers the TP-Link AC1750 Dual-Band 802.11n Wireless PCI Express Adapter, model no. Archer T8E, for $69. Coupon code "EMCAPNR97" cuts it to $59.99. With free shipping, that's the lowest total price we could find by $9. It features 802.11ac WiFi, data transfer speeds of 1,300MB/s at 5GHz and 450MB/s at 2.4GHz, and WPA and WPA2 encryption. Deal ends March 26.