I'm selling my ASRock Z270M Pro4 + i5 7600K due to an upgrade. Everything works as it is supposed to, and I have previously had the CPU overclocked to 4.6GHz at just over 1.2V, so well within the safe limits. It has worked flawlessly over the years and has been kept at around 70c.
There are a couple of bits of damage on the motherboard, the top USB slot on the right is damaged, but the bottom one works perfectly fine. And the clip on the top PCIE x16 3.0 Slot broke off, and the bottom PCIE x16 3.0 slot works perfectly. It has been well looked after despite the two bits of damage. Regular cleanings, safe temperatures and not pushed past the limits. £140 or Open to reasonable offers, collection only.