@grumpyguppy- As the other post said, there are websites available that can give you an approximate value of your dolls. Unless you live in a big city, you probably don't have an antique shop that does appraisals.
Another thing that you can do is go to Ebay and just type in "antique porcelain dolls" and see what pops up. You can get an idea of what people are selling them for.
I had an antique porcelain china doll passed down to me from my grandmother. I went to visit my mother in Seattle and I brought the doll along because there was an antique shop that specialized in dolls and antique toys. When I took the doll in, he immediately wanted to buy it from me. I told him I didn't want to sell it. His final offer to me was $1200. I came very close to selling it but I still have her to this day. I had no idea that I had such a valuable doll.