nullDC is a freeware Sega Dreamcast and NAOMI, the arcade version of the hardware developed by Sega. It is developed for the Windows platform and is already able to run some games.
I went to auction at a mom/pops video game store few months ago that was closing, and bought 11 slims for $200, 1 was DOA but 10 work fine. so hella deal. Already rgh3'ed 8 of them. But most younger kids don't even want anymore, unless it plays stupid "fortnight", or newer shit.