>>4139718While the /jp/ thread primarily focuses on vinyl, anime-style dolls from companies like Volks, Azone, and Obitsu, there is another side of the BJD hobby featuring dolls cast in resin and strung with elastic- they traditional "ball-jointed doll" people think of. These, too, come in scales ranging from impossibly small to roughly 150cm, and the prices vary accordingly. These dolls tend to be styled more realistically (i.e., they look like people with noses,) but there are anime-style dolls in this group as well from sculptors like Aimerai and 2D Doll. If you prefer the more realistic look, the world is your oyster, from the high fantasy creations of companies like Doll Chateau and Dream Valley, to the extremely popular "Minifee" line of dolls from Fairyland, to more accessible, affordable options from companies like ResinSoul, Doll Family H, and even little doll-pets from creators like Miss Nekotaku on etsy and Camellia Dynasty, who runs their own storefront. That's a whole other field of dolls that's a bit out of my wheelhouse, though I can certainly try to answer your questions.
The thing to be considerate of with resin dolls is that it's unfortunately easier to find bootlegs than actual dolls, because the people making them are primarily one guy sculpting in his basement, whereas the guy making bootlegs has a fuckhuge chinese factory and the time and funds for SEO. Bootlegs cost less, but they can have QC issues and tend to steal photos from the official website and people on flickr/instagram to promote their products. The hobby is mostly crafted by small independent artists, as well, so some people take an ethical standpoint against them -- it's a controversial subject that I unfortunately have to mention. A good place to see a shit ton of resin doll options is ACBJD, Denver Doll Emporium, BJDivas, or Stacy's Pink Ocean. They're all reliable and I've done good business with them personally.