I bought an OP-Z from DV247 in UK in Feb 2019 but recently returned it under warranty as the keys were re-triggering. I have today (22nd August 2019) received a brand new unit as replacement (completely sealed) but I no longer wish to keep it.
Will provide all original paperwork together with the sealed unit.
£450 inc P&P (Paypal F&F please)
Sold many times on here and muff wiggler.