Good thing the owner talked to the author before putting them up for $15 each...
Surely the market value of these will only hold up as long as they're within the normal lifespan of the people for whom the original NES is a nostalgia item?
For example: If you were born in 1978 and were 7 to 8 years old when your parents bought the original NES and brought it home with a small selection of games, that's probably a core memory for you. And probably exactly the same demographic now who will pay big money for these things.
But as this generation of people ages, do people who have no childhood memory of a NES (or SNES, or Genesis, etc) because they were born in 1999 consider these things to have any value? Will their value drop significantly when there's no longer a population of age-range-appropriate nostalgic collectors to buy them?
If these are being treated as some kind of "how many dollars per unit" valuable commodity to be traded/hoarded, is it the best possible solution to convert a collection of something like this into currency before the collectors age out of the market?
Or for a few dollars/nominal cost. Sort of like the people who are buying and restoring 30-year old i386 gaming PCs for retro stuff, you can find the hardware for free if you talk to enough older people. Or find a way to intercept it before people literally huck it into a dumpster or take it to electronics recycling. Same for some people who luck into getting nice old 27 inch Sony Trinitron CRT TVs for free.
But when we're talking about thousands of dollars or more per unit for a sealed (so you can never actually open or play it without ruining its value and grading) game in a plastic box, that's a whole other ball game...
Nowadays you go to the flea market it’s a full-time reseller charging e-Bay influenced prices on all products. There’s no deal to be had. Feels like a death of an era sadly.