flea

Go to a bike shop. They may have some good deals, especially if it's a shop that takes consignments. They are also more likely to have non-branded bikes. I'd go 16". She'll grow, and you'll probably have training wheels on it at first anyway. And do go neutral, because it'll be Dillo's bike in a couple of years. (Although, my first two 26" bikes were hand-me-down girl's bikes with big ol' balloon tires which I rode constantly with no lingering deleterious effects. <twitch>)