That’s right, an ultra rare Sega Saturn SGX system is selling for $710 on eBay. Auction page.
It was licensed by SEGA and manufactured by SunSeibu and it was used in Japanese hotels. I could not find any information about it, so as far as I know it is a coinop SEGA SATURN in a metal box (you can set FREEPLAY mode), it also includes a 7 CD charger