Mercusys MR60X AX1500 Wi-Fi 6 Dual-Band Router $31.45 + Delivery ($0 with Prime/ $59+ Spend) @ Amazon AU

This is surely the cheapest WiFi 6 router?

I actually use this myself. works great using Plex, Synology and 20+ devices on a 250 down connection.

not bad for the price of lunch at nandos!