Porcelain Dolls. Are they worth anything??

Values for dolls depends a great deal on their maker and vintage, some will have markings impressed at the back of the neck to indicate the maker. You'll probably have to get them physically examined to determine their maker and vintage. I'd suggest contacting a local auctioneeer for a referral to a doll appraiser/collector

If you're able to, unsnap the top one or two snaps on the back of each doll's dress.  Look for a printed/stamped mark below the hairline or hidden by the dress.   Do you see a name, logo, or anything?  That info is needed to determine maker which in turn determines value.   

Doll in pink dress (#7 photo) has a tag hanging on her wrist.  What does it say?  

Let me start off by saying I am NOT a doll expert.  But I do resell them sometimes among many other things.  My gut feeling is that most or all are contemporary dolls (1980s or newer) - maybe 1990s.   They do look like porcelain.   Unfortunately being out of the box means that they're no longer "new" or "mint" condition.  Do you have the boxes for any of them?  Original boxes & paperwork can add value. 

With no idea of maker,  treating them as generic contemporary unsigned dolls w/o boxes, I'd expect to see them sell for $10-$30 each in my region.  But I can't handle or examine your dolls and I don't know the brands/makers.