Is hard to give you an exact answer as they are many variables affecting the final price.
At Swie.io we are bringing the price per unit of large scale PCB/PCBA manufacturing to low volume batches. At the moment we have a minimum order of 10 PCB. If you want, go ahead and drop me an email at ivo.santos@swie.io and I will be able to give you a quote specific for your product.