Target offers the LEGO Technic Class Xerion 500 Trac VC Tractor, model no. 42054, for $129.99 with free shipping. (Amazon charges the same.) That's tied with our expired mention from three days ago and the lowest total price we could find by $50. This 1,977-piece kit includes a LEGO Power Functions motor and can be configured to carry out a number of motorized functions.