AyaNeo Air on IGG cost about $501, but I'm not a fan of Windows plausibly being replaced by AyaNeo OS. If I wanted Linux, I'd use Ubuntu.
https://www.indiegogo.com/projects/ayaneo-air-first-ultra-thin-oled-windows-handheld/x/26128503#/
https://ayaneo.com/product/AYANEOAIR.html