When you hire a new babysitter, do you ask their rate, or make an offer first? Does it matter if it's an on going sitter or just a one time thing for a special event?

And just for fun what's the going rate for you?

Have a baby sitter lined up for a family wedding and it's pretty much the first time I've arranged one. It's my friends nanny so I trust her but of course still a little nervous...