EDIMAX EW-7811Un Wireless Nano Adapter IEEE 802.11b/g/n USB 2.0 Up to 150Mbps
$29.99 - $20 - $2 (promo code: EMCPEWE56) = $7.99 + FS

EDIMAX EW-7811Un Wireless Nano Adapter IEEE 802.11b/g/n USB 2.0 Up to 150Mbps Data Rates, with 16 languages EZmax setup wizard for easy installation - Newegg.com