Walmart offers the LEGO Technic BMW R 1200 GS Adventure Motorcycle for $47.99 with free shipping. (Amazon has it for the same price.) That's the lowest price we could find by $6. It features a 2-cylinder boxer engine with moving pistons, black spoke wheels with all-terrain tires, and is a 2-in-1 model changing from 7" x 13" x 3" to 4" x 11" x 7".