The Asus Tinker board, quad core ARM Cortex A17@1.8 GHz, 2 GB RAM, GBit Eth, 4xUSB 2.0, HDMI 2.0 up to 4K, WIFI b,g,n, Bluetooth, GPIO
ASUS Tinker Board is a Raspberry Pi 3 Alternative based on Rockchip RK3288 Processor
You can expect mainline kernel support and Debian 8,9 + Ubuntu + Android OS.
The price will be about Euro 65 with VAT.
Asus Part number: 90MB0QY1-M0EAY0 EAN: 4712900552874
The board is designed to boot from an external micro SD card, like the Raspberry PI, this is a good idea for prototyping. The drawback is that SD cards are slower and less reliable than on-board eMMC chips.
Results from the work done for the MiQi board from mqmaker (mainline kernel 4.10) are usable on this board.