Newegg offers the Belkin N150 802.11n Wireless USB Adapter, model no. F9L1001, for $0, via the directions below. With $3.99 for shipping, that's tied with our March mention and the lowest total price we could find by $3. (Most retailers charge $24 or more.) It features up to a 150Mbps data rate. Deal ends May 7. To get this price:

1. View the Belkin N150 802.11n Wireless USB Adapter for $10
2. apply coupon code "EMCASAK42" to cut it to $5
3. redeem this $5 mail-in rebate for the final price of $0