newegg offers the Rosewill 300Mbps 802.11n Wireless USB 2.0 Adapter, model no. RNX-N180UBE, for $19.99. Coupon code "RWWA2508" cuts it to $14.99. With free shipping, that's the lowest total price we could find by $8. This adapter features wireless speeds up to 300Mbps, a 5dBi antenna, and WEP/WPA/WPA2 encryption. Deal ends August 31.