Newegg has this Rosewill wireless adapter for $9.99 after instant savings. It supports wireless data rates up to 150Mbps, meets IEEE 802.11b/g/n standards, has 64/128 bits WEP WPA (TKIP with IEEE802.1x) WPA2 (AES with IEEE802.1x) security and comes with a 1 year warranty. Amazon
has it for the $16.99 plus shipping. Shipping is free.