It depends on the location a lot. When I lived in Palm Beach county we paid our sitter $10 an hour for my one (very well behaved) daughter. When we moved here to Melbourne our sitter charged us $5. My daughter is now old enough to start babysitting a bit- she sat for some of my mom's firends in NC and they paid her $6 an hour and she sat for our friends' son once here and they paid her $9 an hour- which seemed pretty generous to me. I've probably confused you more than helped you but that's my experinces in the babysitting world.
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"If you have men who will exclude any of God’s creatures from the shelter of compassion and pity, you will have men who will deal likewise with their fellow men." — St. Francis of Assisi, 1181-1226