Newegg offers the TP-Link 5-Port Gigabit Ethernet Unmanaged Switch, model no. TL-SG105, for $12.99 with free shipping, via the below directions. That's the lowest total price we could find by $7. It features a metal case and purportedly saves up to 65% in power consumption. Rebate ends March 23. To get this deal:

1. Add the TP-Link 5-Port Gigabit Ethernet Switch to your cart for $19.99
2. apply coupon code "EMCRDCB48" to drop it to $17.99
3. redeem this $5 mail-in rebate for a final price of $12.99