I'm not too sure on all this stuff, but I'll add five cents in
I'd just like to remind you that EVERYTHING in negotiable. You are entering a contract with this breeder, which means you have equal say. Do not let them walk all over you, if something doesn't sit well then don't let it go through. Educate yourself with these links, maybe even ring legal aid. It's very important that you stand up for yourself and your needs and wants too.