Vintage ARP Quadra analog synthesizer for sale or trade. Cosmetic condition is excellent. Powers on and produces sound, touch membrane works, but will need a recap and several sliders replaced. I am open to reasonable cash offers as well as partial trades plus cash. The only trade items of interest are a Prophet VS rack or keyboard, Voyetra 8, vintage outboard studio gear, high end effects devices, and vintage tube microphones. Serious inquiries only.