This offer sounds good, but unfortunately too short sleeves and shoulders. I'm 6,4ft and around 210lb. Seller even offerd this one for 70usd but shipping is around 92 bucks plus taxes.If this is a true 42, then I would jump on it immediately.
It would be a good idea to ask for a p2p measurement–tell the seller how to measure. See my guide. If it is right at 22", then it is a true size 42.
It was easier to spot and hunt a pristine M51 first pattern parka than a ww2 peacoat...