Teenage Engineering OP-Z in excellent condition (latest firmware and fresh factory reset applied).
Comes boxed and complete with USB C cable. Extras include an orange pencil case which makes an ideal case for the OP-Z and cables; and USB-C to micro USB and USB-C to USB-A cables to help you connect to your other gear.
Now £400 + p&p, PayPal F&F please or collect from Dundee. Sold many times on here, Elektronauts, Muff Wiggler and over 1000 rating on eBay.