Walmart offers the Bruder MAN Cement Mixer Toy for $40.76. Opt for in-store pickup to avoid the $5.99 shipping fee and drop the price to $39.23. That's the best price we could find by a buck, excluding the mention below. It features a moving mixing barrel.

A close price: Rural King has it for the in-cart price of $29.58 plus about $9.90 for shipping