Where to find cheaper dolls?

Hi! So im autistic, strange way to start this is know, but my special interest is lalaloopsys. I had some as a child and I watch the tv show all the time. I adore it and I can't stop thinking about it. But the issue is my financial situation, I'm struggling with it a lot, but I really want to still collect some of the dolls.

Where is the best place to look for them? Expecially for the lower prices?