Not sure for $30, but for $50 you can get the Odroid Go Advance which is a very nice piece of hardware: https://www.hardkernel.com/shop/odroid-go-advance-black-edit...

You can get a handheld that can emulate most 2D consoles (e.g. gb, gba, nes, snes, genesis, DOS, etc)

https://retromimi.com/products/pocketgo-retro-gaming-system