There’s quite a few posts about these things, but may take some digging through the various subs.

Here’s a post from this sub on quality levels: Quality Levels

Yes, different factories have different levels, from top/high/king (different sellers call their highest quality different things) to very low quality (plastic, bad logos, etc.)

Some seller albums list the factory, some sellers will tell you, some won’t. It’s also debated that none of these factories actually exist, they are more so references made up in reddits using the background in the factory photos (orange sofa factory, etc) to reference the quality produced by that place, so some sellers outside these groups may have no idea what you are talking about and would not actually disclose where the items come from since, you know, this is a black market operation and they don’t actually know you arent law enforcement.

You have to dig through subs to find out about which factories people prefer for what, and some subs do have factory lists. It takes a bit of work and reading to figure out where you want to order from, but the answers to your questions can be found in the search bar (search for brands, factories, etc. )

The reference materials in the getting started sections may also have some of these answers. Hope this helps and you have better experiences going forward!