Printed circuit board to be needed

[fina]

I have sent some PCB designs to factories for prototyping. The price, however, varies greatly. Some ask 200USD for a four-layer 5cm*10cm PCB prototyping. While some only ask for 50USD. I assume that there are differences between these two factories. However, I could not find the differences. Could I ask for some advice here?

[pebe]

If the 50USD quote is from China it ill be because their labor costs are lower.

[bwetman]

"For more information about PCB you can visit at [http://www.epectec.com/pcb/data/url] and also can visit at Soldertools"

[circuitboardready]

Even both factories located in China, there are also that big price different. It's quite depends what sort of techni or quality you are looking for. USD 50 is normal price for sampling.