Thank you for that listing on Chinese parts.
I’ve never bought Chinese components - but I can certainly see why people do!! At those prices, even if you had 5% fallout in production, the cost savings would still make the line profitable. I’m used to dealing with a manufacturing line at the 98-99.5% yield rate - and at those levels, barely making any margins.
With the BOM at about 10% of the cost for American - I can see why they are whipping out butts.
http://www.taydaelectronics.com
There are even cheaper suppliers but you have to buy from them in enormously large quantities. This outfit is not the cheapest but they take paypal and shipping is very cheap for standard post...takes a couple of weeks to arrive though. You can find cheaper suppliers on ebay from China with free shipping...I just got a envelope from China with 100X 5-Pin Female Mini B USB SMD Socket Connectors for just 16.99 including the ship cost...that's 17 cents each! It's amazing.