Amazon offers the TRENDnet GREENnet 8-Port Gigabit Ethernet Switch, model no. TEG-S80G, for $19.99 with free shipping. That's $5 under our July mention and the lowest total price we could find by $5. This unmanaged switch uses GREENnet technology to automatically adjust power voltage for energy savings.

Note: It's currently out of stock, but can still be ordered at this price. (No estimated ship time is given.)