NeweggFlash offers the Trendnet AC1200 Dual-Band 802.11ac Wireless PCI-Express Adapter, model no. TEW-807ECH, for $39.99 with free shipping. That's the lowest total price we could find by $18. This adapter features both 2.4GHz and 5GHz bands, up to 1,167Mbps data transfer rate, and a 500 mW radio. Deal ends March 5.