I've got SO many doll-making books (actually both teddy bears AND dolls) that I figured offering them in a group setting would ensure they get to happy new homes of other dollmakers. I've started the Facebook Group:
https://www.facebook.com/groups/dollcraftbuyselltrade/
Here, members can buy, sell, trade, and advertise their doll-related items in their shops - i.e., Gypsy Spoonful, Etsy, eBay, etc.).
There weren't that many other doll groups on Facebook that had as wide a range of interests, they seemed limited to a certain type, etc.. But I'm quite eclectic in my doll tastes; I would love to have a beautiful Gene doll dressed to the nines; but I also love funky art dolls. So if you too love dolls of any sort, come join in the fun!