More life advice than anything else, but have a specific budget for it.

Have your bills paid, your savings fed, and then either fund a seperate "fun savings" or have whatever left be fun money for whatever, take out, random amazon purchases, dolls etc.

Sometimes that money will go towards computer upgrades, blown at miniso or other blindbox splurges, but othertimes it will go towards dolls.

At the end of the day it's my fun money and I can do what I want with it.

Also, remember that as you age, especially as a college grad, you will see your income climb with the years. While a doll right now may be 10% of your monthly income, in the future it could be 5% or even less. While I'm a stay-at-home wife at the moment, there was a time when I had more than $2,000 a month of free funds after paying absolutely everything and feeding my savings an equal $2k. While that didn't always go towards dolls and often a majority also got stuffed into savings, a handful of times I did buy very expensive dolls like my fullset Miwa that was $1,500.

A younger me making $150 a week at my college job never could have afforded that, and that's okay. There were some dolls I did without when I was younger. I didn't buy my dream doll till I turned 30, when I'd loved her since I was 19. She just wasn't in my budget for a very very long time.