ebay is probably your best option if you own the relevant systems. You can also look into emulators for your PC. Third option, get a Nintendo Wii. They release games every monday that you can download, for a fee, of old games from the NES, SNES, N64 and Turbo Graf 16 systems. I do have some NES and SNES games but I'm not willing to part with them at the moment.
