Walmart offers the LEGO Ultimate 405-Piece Building Set
, model no. 6166, for $15
. Shipping costs 97 cents
, or choose free Site-to-Store. Even with shipping, that's the lowest total price we could find by $10, outside of the price below. Sales tax is added where applicable. It features a building plate, minifigure, windows, doors and wheels, plus instructions for at least five models.
Alternatively, Amazon.com has it for $15 with free shipping on orders of $25 or more. (Orders under $25 are charged $6.03 for shipping.)