Collecting dolls is a different 'hobby' than lolita fashion but it's a little bit connected to lolita fashion because some lolita brands worked together with doll compagnies to make dolls.
Luna, Charlotte,Bianca and Kurumi
Lolita dolls aren't cheap:
blythes cost 100~200 euro each.
If you are lucky they cost a little bit less but for a limited you will pay much more money
Pullips cost around 100 euro, limiteds are exceptions.
Ball jointed dolls are very expensive they cost +200 euro and some of the volks dolls are worth about 1500 euro, that's so
I don't think I would ever pay so much money for a doll...
That's not all, real lolita dolls are pretty rare except for pullips.
Those blythe dolls were limited editions they were only sold in Japan, I believe.
And when you want to buy a volks doll you have to join a lotery, you are never sure if you can buy the doll that you want unless you buy it second-hand.
There are other ways to own a 'lolita' doll.
A doll can wear lolita clothes, some doll compagnies
sell lolita clothes, some people make lolita clothes or you can
make lolita clothes yourself. For example Bunny:
!Bunny from velvetbat she is a soom Mylo and she wears lolita
fashion which is handmade by velvetbat. She is such a cute doll! (@velvetbat, I hope you don't mind that I used this photo ^_~)!