Khurasan Miniatures has released a really cool set up sci-fi cars for 15mm gaming. These are perfect for any type of gaming scenario. The cars were designed by John Bear Ross (nice).
The cars retail for $4.95 for a set of 2. You have the option of either wheeled or hover.
(The figurine is Desiree Kim model from the Heroes of the Sepulvedan Resistance pack, which was sculpted by Tom Meier and painted by Jennifer Haley, and shown here for comparison purposes only.)