Newegg offers the Asus AC1300 Dual-Band 802.11ac Wireless PCI Express Adapter, model no. PCE-AC56, for $63.99. Coupon code "EMCETFG23" cuts that to $49.99. With free shipping, that's the lowest total price we could find by $14. It features data transfer speeds of 867MB/s at 5GHz or 400MB/s at 2.4GHz. Deal ends April 13.