TP-LINK TL-SG1008D 8-Port Gigabit Switch for $23.99.  Shipping is $1.99 for a total of $25.98 shipped.  Here is a screenshot for your reference.  It supports IEEE 802.3x for full duplex mode and backpressure for half duplex mode, non-blocking switching, MAC address auto-learning and auto-aging, and more.  Most places have this gigabit switch for about $32.