Keyboard Yamaha PSR-640 With Floppy Drive, Midi & Pitch Wheel 61 Key Performance | eBay
Yamaha PSR-640 Portatone Keyboard 61 Key | eBay
yamaha psr 640 keyboard music workstation with stand; 61 piano size key xg portable keyboard with lyric song display for Sale in Baltimore, MD - OfferUp
yamaha psr 640 keyboard music workstation with stand; 61 piano size key xg portable keyboard with lyric song display for Sale in Baltimore, MD - OfferUp