I would definitely go for smaller vehicles like the Swamp Skiier or Trouble Bubble, except as others say, the price would probably still be $150+, which would be waaay to high for me (lord only knows what Sideshow would charge from something like a HISS Tank or Awe Striker).
Maybe they could use cheaper material and charge a more reasonable price?
Maybe they could use cheaper material and charge a more reasonable price?