Toys "R" US offers the LEGO Technic Mercedes-Benz Arocs 3245 Kit, model no. 42043, bundled with a LEGO Ninjago Airjitzu kit for $183.99 with free shipping. (You'll need to add both items to your cart.) That's $54 under the lowest price we could find for the pair elsewhere. This 2,793-piece kit features an extendable crane arm, four suspended axles, double wheels on the two rear axles, opening tailgate, warning beacons, and wing mirrors.

Of note, Amazon sells it without the freebie for the same price.