Groupon offers the Go! Mario Kart Wii Slot Car Racing Set
(pictured) or the Go! Spider-Man Manhattan Madness Slot Car Racing Set
with free shipping
. That's the lowest total price we could find by $64 and $65 respectively. The Mario set features a 16.08-foot track with Wild Wing Mario and Luigi cars. the Spider-Man set features a 17.38-foot track with Spider-Man and Lizard cars. Deal ends March 20 at 1 am ET.
Note that although the Mario Kart set has "Wii" in its name, this is because it's based on the Wii game's car designs - it's not a Wii game itself.