Amazon offers the Levi's Toddler Girls', Little Girls', or Big girls' 715 Thick Stitch Jeans in Blue Rapids for $5.99. At checkout, the price falls to $4.79. Plus, Prime members receive free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping adds $5.48.) That's a savings of at least $15 on each pair. They're available in girl's sizes 10 to 12, little girls' sizes 4 to 6X, and toddler girls' size 2T.
Note that although they're temporarily out of stock, you can place an order to be shipped when they become available.