Brand new Taiga CPA-08 Goretex field jacket in size Large. I think this is the most high end jacket i've come across (and i've seen a lot of different jackets). Jackets like this arent marketed towards the public so theres not much on the internet about this particular one but i've found the same jacket in an arctic cam advertised on Cold Skills (https://www.coldskills.com/lang-EN/shop/product/taiga-field-jacket-cpa08-tsup) and it retails for 8995SEK which is 762GBP. I'm asking for 400 and this is brand new with the tags still on.

For those of you who havent heard of Taiga before they are a Swedish company who make some really high end clothing systems for both hot and cold climates, and sell to special forces all around the world including the UK

https://www.taigamilitary.com/