Newegg offers the TP-LINK Dual-Band 802.11n Wireless N900 PCI-Express Adapter, model no. TL-WDN4800, for $39.34. Coupon code "EMCWWHW26" cuts the price to $24.99. With free shipping, that's $8 under our March mention and the lowest total price we could find today by $5. This adapter offers the use of 2.4GHz band or 5GHz band at speeds of up to 450Mbps and features WPA/WPA2 encryption. Deal ends November 27.