Centrix International via eBay offers the OEM Netgear 802.11n Wireless USB 2.0 RangeMax Adapter, model no. WN111-100NAS, for $7.99 with free shipping. Aside from other eBay sellers, that's the lowest total price we could find by $5. Features include WPA/WPA2-PSK data encryption and up to 300Mbps data transfer rate.