Robert Falck from Vancouver built a 1989 Cadillac Brougham limousine onto a Bombardier Skidozer snowcat. You can own this fine vehicle for $6,000. According to the Craigslist ad, it was "last used 2 years ago." From Jalopnik:
Falck said he built this contraption for a movie, which featured a rich guy who owned a ski resort. When filming was done, the Vancouverite decided to buy the Caddy back. Now it’s up for sale on Craigslist for a price that, he says, doesn’t reflect what he’s put into the vehicle.
Falck says the thing will move, but it’s not likely to climb a mountain or blaze its own trail; the vehicle is best left on groomed trails, and it’s not likely to exceed 15 mph.