Scotty is doing a good job of catching everyone up on what is going on in China. Chinese manufacturers have been putting out 10x10x10 boards for 50 RMB ($7 USD) for many years now. Rush order (24 hours)? Another 50 RMB. Yellow solder mask? Also another 50 RMB. Once you start talking about 4 layer, flex, rgba solder mask or other customization the difference is even greater.