The Rock Pi E is the latest single-board computer by Radxa. Based on the Rockchip RK3328, the Rock Pi E is available with up to 2 GB of RAM and features dual Ethernet ports. The Rock Pi E starts at US$24.00.
https://www.notebookcheck.net/Rock-Pi-E-A-compact-Raspberry-Pi-alternative-with-dual-Ethernet-ports.483207.0.html