You are looking at one of the finest synths ever built. The Memorymoog Plus is essentially six Minimoogs stuffed into one glorious analogue keyboard. This particular Memorymoog is in better shape than any other I have seen. The synth has no operational problems. All the oscillators tune up reliably. There are just a few fine scratches on the back of the synth. They are visible in the pictures below. Since this is the Plus model, it is fitted with a built in sequencer and MIDI. Because of the nature of analogue synthesizers, especially the Memorymoog, I suggest that you get the keyboard