This is a mint condition DX7 II FD - the top of the line DX7. Included with it is the RWC-129 cartridge (and ADP 1 adapter that's needed). The RWC-129 cartridge is 32 cartridges in 1, for a total of 1024 patches: 32 times the size of the factory Yamaha RAM1 cartridge (1024K)! It comes preloaded with tons of sounds, and is also rewritteable. Below is a link to the cartridge on ebay. Just fyi, the cartridge alone is $279, and the adapter is another $250! (Ebay link also below).
This DX7 is from a smoke free home studio, never gigged on, it never left my studio. $1200