This cheap handheld can emulate games, but also plays your physical GBA cartridges

Credit: GAMEMT TL;DR The GAMEMT MTX is a new sub-$100 handheld that has a cartridge slot for Game Boy Advance games. It can also emulate SNES, Genesis, PS1, and PSP games via conventional ROM files. The MTX is available at a promotional price of $80 via the official website.