We are very close from having the final prices but what we have now are very close.
You can add your own projects to see the cost and here is cerbuino as an example http://www.turnkeyassembly.com/project/14/quote
$26 only if you buy 100! This is not final like I said.
I think you module makers will love this.
This includes all labor, pcb, components and even the machine setup!