newegg offers the TRENDnet GREENnet 8-Port Unmanaged Gigabit Ethernet Switch in Black Metal, model no. TEG-S80G, for $19.99 with free shipping. (Amazon charges the same for Prime members.) That's the lowest total price we could find by $19. This GREENnet device claims to reduce power consumption by up to 70% compared to standard unmanaged switches. It also features eight Gigabit Ethernet ports and a maximum data transfer speed of up to 1000Mbps.