I have. Basically what he's saying is they can't ship directly outside of China so you need to buy through an agent. Like I said, that's not as complicated as it sounds. There are a whole bunch of different agents you can go through, one of the most trusted and easiest to use is [Superbuy](
https://www.superbuy.com/cn/). You enter the URL into the site and buy it through them, and then the seller ships it to a Superbuy warehouse. Once it arrives they take quality check pics for you to make sure it looks good (you can also pay a tiny bit more, like ¥2, for extra pics like measurements) and then you can have it shipped to you. The only downside is the shipping can be pretty expensive since they have to charge extra in order to make a profit. Unless the coat's a lot bigger/heavier than I'm expecting the shipping to the US would probably be about $50 or maybe a bit less, and probably pretty close for anywhere in Europe.
I'd ideally buy from a coat that has reviews with user pictures posted, but if that's not the case at least make sure the seller has some items with reviews so you can get an idea of how accurate their listings tend to be. If you send me the link I can tell you what I think. I'm not an expert by any means though, I'm sure there are tutorials that can explain better than I can.