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irongarment: I suggest you check out http://dangerousprototypes.com/blog/ and the dangerousprototypes forum, and the associated dirtypcbs.com and other dirty services sites. There you will find out all the trials and tribulations of building stuff in China, including sourcing parts. Have fun. It's a bit of a rabbit hole.
Bunnie Huang's blog and his book "The Hardware Hacker: Adventures in Making and Breaking Hardware" are also excellent resources on how this game is played. It's nothing like how standard electronics development operates.
