The famous GB Boy Colour is now for sale on esotericmods!
These are great backlit Game Boy Color clone systems. They have built-in games and you can play real GB/GBC cartridges.
The one downside is that the screen aspect ratio is slightly off from an original Game Boy Color, but the difference in price of a real backlit GBC makes up for that.
Note: This is a drop-shipped item and shipping will take between 12-20 days to arrive to you. This was the cheapest option for the GB Boy we could find and comes from a reputable distributor.