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 5500 ELECTRONIC PIANO WITH STOOL - BEAUTIFUL CONDITION - Able Auctions
Korg SP280 Concert Series Digital Piano with Spea | J.W. Pepper
Korg C-8500 Concert Digital Piano for Sale in Fort Lauderdale, FL - OfferUp
🎹Korg concert C-40 digital piano | SOLD❤️ 🎹Korg Concert C-40 digital piano 💕Price: 22,000 pesos only! ✔️Imported from Japan; second hand ✔️In good condition ✔️88 keys weighted, all... | By Piano Forte Philippines | Facebook