Walmart offers the Puzzled 3D-Puzzle Wood Apache Helicopter Construction Kit for $5.82. To drop the price to $5.57, opt for in-store pickup. That's the lowest price we could find by $3, outside the below mention. This 80-piece puzzle measures 16" x 15" x 5.5" when assembled.
A close price: Fry's has it for $5.99 via in-store pickup.