If the game is out of print, buying a used copy, even at scalper prices, isn’t going to benefit the original devs or even the publishing company at all. They won’t see a penny of that money.

In my particular situation, my son has an OLED Nintendo Switch and a fairly big, growing library of games for it. Nintendo is already getting plenty of my money. They’re not losing any significant amount of money over my fullsets of NES, SNES, and N64 ROMs, the vast majority of which are not available on Switch Online / Virtual Console.