However, some games are freeware [0], I guess you don't technically buy those, but they certainly are legal. Some homebrew devs might be selling ROMs this way, too, but you'd have to reach out to the devs. If you want to license individual games, you'll have to figure out who owns them & ask. They likely won't part with it, as these deals aren't really B2C. Plus, you might be competing with Arcade 1 up, whatever they think they can get from selling on services like PSN, etc.
However, some games are freeware [0], I guess you don't technically buy those, but they certainly are legal. Some homebrew devs might be selling ROMs this way, too, but you'd have to reach out to the devs. If you want to license individual games, you'll have to figure out who owns them & ask. They likely won't part with it, as these deals aren't really B2C. Plus, you might be competing with Arcade 1 up, whatever they think they can get from selling on services like PSN, etc.
0 - https://en.wikipedia.org/wiki/The_Adventures_of_Robby_Roto!