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 Piano (Model C-15S) for sale. Full 88-note weighted action keyboard that gives you the solid, responsive feel of a concert instrument. F for Sale in Auburn, WA - OfferUp
Nonlinear Labs C15 - Is it Worth It? - Perfect Circuit