Best no-brainer easy-to-flash easy-to-buy cheap router with usb

  • Any restrictions on Wifi? Is single band sufficient, or dual band needed, or no wifi at all?
  • 100mbit LAN ports sufficient, or Gbit required?
  • What is "cheap" for you? How much are you willing to spend?
  • What is "easy to flash" for you? Is doing simple steps via SSH already too much?

General advice thread for cheap devices: What's your favourite cheap LEDE/OpenWrt device?