Ali Express?

I also purchased YH parts from Ali Express. Shipping was long at around 8 weeks, but it all got here. I purchased from one of the other Chinese sites, I think ALi Baba, total fraud, but the site refunded my $$ without any problems. Seller was a fraud. Of course, the deal was too good to be true too. 3d printer for $50.

Anyway, so far, no problems but only a couple purchases
 
purchased quite a few things from there ... points to consider are theyre much like a chinese based amazon except they host individual stores and manufacturers only instead of stocking their own products also ... although that promotes an honest atmosphere your basically not getting the same ease of returning stuff and solid gurantee you would with amazon .. if you do have a problem, which i have a couple of times, theres going to be defacto little to no recourse .. so, with that said, stick with the mainstream big out front and popular outlets and products and theres usually no issues, your getting fresh stuff 'from the source' so to speak and they want your business so pack it good and shipbit out asap ... but if you dig around trying to get an even better deal or a more obscure product from a smaller outfit your chances of getting ripped off and dealing with shady characters go up exponentially, more or less ut will become 'likely' ... so its like that .. stay out front with the popular stuff, youll be good ...
 
I have had good success with Alibaba. Many suppliers purchase from Alaibaba and simply rebrand.

I purchased a key-less proximity ignition system for $49 where the going rate at the time was $349 up. The problem was that the instructions were all Chinese. I followed the US rebranded installation instructions on youtube with no problems; it was the same device.

I got my ISO certified air tank for around $110, and the valves for about another $90; it's still working perfect.

I believe Alibaba is a manufacturer direct source and Ali Express is a means to deal with wholesalers.