The factory say it makes 1500 trumpets a year, yet I can count at least 150 fully assembled units in the photo. So inventory is high, I think 1000 a month more likely. Also the comment about the horns come unbraded, and you can have whatever you want on the horn???
My experience is based on living and working full time for 6 years from 2002 to 2008 in a manufacturing environment. I know that there are good manufacturers in China, and there are also poor manufacturers. The difference for me was about $30 to buy a good horn vs crap. I got a couple of duds the first time, but eventually found a good manufacturer in Shanghai. The good units I bought in China are still going well, I told the supplier to only give me his best units, and I would not haggle over the price, but the moment he supplied me crap, I was gone from his store. After that, I got good gear - and did not try to negotiate the rice down - this was unusual at the time.
I have bought some Berkerly instruments off Ebay, and they are variable - some well worth it, others can go straight to the bin.
My view is that China will get better and better, and eventually target longevity. Quality thinking does exist in some factories.
Sadly, things like unbranded instruments, with no serial numbers will always be an issue, but as long as someone is willing to buy them, they will be made in China. I am sorry that Ivan's reputation is soiled by a copy from China.
I have one of Ivan's horns, and can recommend it - in a definite separate league to the Chinese for quality. That is why you pay more for it, but it is worth it.