Korg Concert C-15S for $100 on C-list. Had speaker issue I couldn't resolve, so I got a Dell laptop for $74, turned it into a Hackintosh with MainStage 3 : r/cheapkeys
Korg Concert 7100 Electronic Piano | Classifieds for Jobs, Rentals, Cars, Furniture and Free Stuff
Amazon.com: Korg C1 Air Digital Piano with Bluetooth - White : Musical Instruments
How to Repair Korg C-25 Concert Piano no sound - YouTube
Korg C5000 (MT Nov 87)
Korg C-15S 88-Key Digital Piano | Reverb
Korg C30 photo gallery - Syntaur
Digital Pianos / Home Products | KORG (USA)
KORG CONCERT C-900 – An Piano
Amazon.com: Korg C1 Air Digital Piano with Bluetooth - Black : Musical Instruments