The flutters don't seem to go for that much as they aren't that popular
I would think $15-20 each for them.
Squeezer is a hard one, I would think around $30-50 she's not as popular as Bobbie but I do feel she is harder to find. There are a couple of versions of her too.
I'm going to say no less than $100 for each princess, I need to have a dig round for accurate prices for Amber and pristina
I paid £55 for my princess amethyst who is identical to yours
Love pkw xx