Quoted from benheck:
To explain this in pinhead terms, it's Nintendo's MMR, IMVE or BBB.
Retro Nintendo is white hot at the moment, and real NES cartridges fetch $20+ for even common games. A used NES console under $50 is almost impossible to find.
So yes, this is 3x more expensive than your average TV games console (= Nintendo prints money) but it's also massively cheaper than collecting even a fraction of the included games.
I think this is more like zizzle than mmr