Newegg offers the Linksys by Cisco 802.11n Ethernet Bridge, model no. WES610N-CA, bundled with Total Defense Premium Internet Security 5-User for Windows, model no. ISSPSDNCNE5, for $45. This $60 mail-in rebate yields a profit of $15. With free shipping, that's the lowest total price we could find for the bridge alone by $65. This dual-band device makes any wired Ethernet device part of your wireless network. It's compatible with 802.11n networks and features four Ethernet ports. Rebate expires December 31.

Note: Total Defense Premium Internet Security must be activated before the rebate can be redeemed, which involves providing your credit card information. However, you can cancel the service at any time within the first year without incurring any additional charges.