Amazon has the Philips Sonicare for Kids Rechargeable Toothbrush for just $49.99 (reg. $70) shipped!
Both of my girls have this toothbrush and I paid full boat for it, but I can tell you firsthand that I would gladly pay full price for another one. Their last two dental check-ups were perfect and I attribute that to this toothbrush! This is the cheapest you’re going to find on this toothbrush, the lowest price elsewhere is about $65.