I refuse to pay online finders fees for professional babysitters and I've finally found a lovely, trustworthy, child-experienced 15-year-old girl near me to sit for my boys (4 and 2) on the occasional evening out. They'd be in bed and are (usually!) very good at staying there, so she wouldn't be expected to do anything other than sit and watch telly. But I'm agonising a bit over what to offer her - things have changed since my days of doing similar! I don't want to be cheap and take advantage (she's very sweet and would, I suspect, take whatever I offer) but we're not made of money. Any thoughts on the going rate?