No but last year I sold a 7 month old CJ Mf2550 250wpc power amp with box and manual for $2200.00. It was a “10” and the person who bought it from me called me a week later, thanking me. In my system it sounded as thick as cold maple syrup. In the new owners system, it was perfect. (His words). Check The Music Room, they usually have a lot of used CJ equipment.