You did good on that trade. The Marantz is a decent solid state amp from the 1970's A powerful workhorse with a phono stage but nothing super special. There's a ton of them around. Besides, I could never be happy with those cheesy speaker wire binder boxes instead of proper screwdown posts. Sorry - I'm an audiophil
The Marantz is cool but not nearly as neat or collectible as the Stingray.