Porcelain Dolls

My great grandmother over my life span has been giving me huge bags of dolls, I simply can not keep them all. So besides from a selected few I'm selling them. 

Now I have no clue what needs to be done to even sell a doll, I would love to see if I can get the general year it was made, which country it comes from and if possible (but i know most likely for most of them not) by whom's hand was it crafted. 

All of the dolls I have are porcelain - Some have numbers on the back of thier necks. 

These ones I couldn't find marks on the back of their necks - I'll make a thing of just ones with markings later on.