Newegg offers the ASUS Bluetooth 4.0 USB 2.0 Adapter, model no. USB-BT400, for $4.99 with free shipping via the directions below. That's tied with our mention from a month ago and the lowest total price we could find by $5. It features transfer rates up to 3MB/s. Rebate ends January 4. To get this deal:

1. Add the ASUS Bluetooth 4.0 USB 2.0 Adapter to your cart for $14.99
2. apply coupon code "EMCPWPH59" to cut it to $9.99
3. redeem this $5 mail-in rebate for a final price of $4.99