For its Prime members, Amazon offers the Melissa & Doug First Bead Maze for $13.12 with free shipping. (Non-members can spend $35 or more for free shipping; otherwise, it adds $5.01.) Outside of the price below, it's the lowest total price we could find by $3. This bead maze features smooth-sanded pieces, various shapes and colors, and a suction cup base.

A close price: Target via eBay has it for $13.49 with free shipping.