the Ad states it is facelifted. Perhaps he means the fake grill.
Two former keepers is good if true. I would say people may have been out off by the huge price of the car previously vs the mileage. My old c63s estate was 2018 and was recently listed for 36k with 49k miles when prices were more punchy generally and that sold quickly.
You're currently not spoiled for choice unfortunately:
www.autotrader.co.uk
However there's a couple more that are on sale by dealers that you possibly could negotiate on price and they have good options like the black one and potentially get high quality warranty for piece of mind.
However best to coordinate a specialist to perform an inspection and check codes etc. At 69k miles, worth checking whether all other shocks have been changed apart from the problematic front passenger one , and also the last time the rotors were changed plus on these ones the coil packs seem to go , you can ask whether replaced at any point though they're not a big job it seems.
Any idea what the engine cover and undertrays fitted MOT advisories could be referring to ?