It's been 4+ years since I babysat last (when I did, I made around $9 an hour), so I asked my little sister, who seems to be babysitting for one or another of our church families for at least part of every weekend. She said that she never charges a fee, and doesn't actually ask for payment either, but she does keep track of what they give her (she puts 3/4 of it in her savings account each month), and said it worked out to around $10 an hour, or thereabouts. She might get paid a little extra if the parents are running late or get home late, and she usually makes at least $20, even if she's only there for an hour or so (it's not really worth it as a teenage babysitter to only sit for less than a couple hours and make only $10). The families with pets tend to give her a little more. I think the most she sits for right now are families with 3 or 4 kids, and she makes about the same whether it's a family with one kid or a family with three. Almost all the kids she sits for are either preschool age or early school age; the families are all families from our church whose kids are in nursery/evening programs together, and they pretty much universally recommend my sister to anyone who asks. I don't think a family has ever ordered pizza for the kids and her, but since most of the kids are preschoolers, that makes sense. She's never asked to cook anything elaborate; often the kids have already been fed or she makes box mac and cheese or frozen pizza. Sometimes she puts the kids to bed; sometimes she doesn't, never baths.
I would second the PP who said that you should try to establish yourself with a babysitter, and then, once you find a good babysitter, recommend her/him to your friends and relatives! My sister started out in the nursery of our church, then started working in the preschool room of our Wednesday evening children's program. Then the adult leader of the preschool room asked her to start babysitting her kids, and (since my sister is apparently a decent babysitter; we were all shocked

) the adult leader started recommending her to other preschool families at our church. Soon enough, she had four or five families calling her regularly for babysitting. As a former teenage babysitter, and sister to a current teenage babysitter, I know from experience that this is the best way to make money at babysitting. It's slow going with only one family, especially if they don't require a babysitter often, but with multiple families calling, it gets a lot better.
And to the PP offering parenting criticism, the OP was only asking for suggestions for what to pay a babysitter. And, for what it's worth, my older brother is a year older than me, but five years older than our younger sister. My parents didn't leave us at home alone until he and I were both old enough (age) and old enough (responsibility and maturity) to look after our younger sister. You may think a 10-year-old is old enough to stay on their own (I would disagree, with extremely few exceptions for exceptionally, incredibly mature/responsible 10-year-olds well-versed in the safety rules), but I would never leave a 10-year-old at home alone with their significantly-younger sibling. I know when I was 10, I would not have been a good babysitter for my 6-year-old sister. I didn't start babysitting for other people's kids until I was 12. My parents didn't start leaving us at home alone until I was nearly 12, and that was out of necessity (my mom's new job) and only for a few hours max per day, until I was 13 or so. The family I babysat for kept me on until their oldest was 12--and the two kids were within a couple years of each other. Some kids might be fine staying at home with their siblings for a couple hours at 10 (though I would never leave siblings with more than a year or two gap at home alone that young), but a lot of kids wouldn't be fine at home alone that long, never mind with a sibling. And a lot of younger siblings won't take well to the older sibling being in charge--that's hard enough to deal with as a 12-year-old with an 8-year-old, but as a 10-year-old with a 2-year-old? I wouldn't do it. Some kids are great babysitters young; others will never make a good babysitter (my older brother is 21 and still is terrible with kids). But I would never leave a 10-year-old at home alone with a 2-year-old, and probably wouldn't leave the 10-year-old at home alone either.