Bobcat
Je Suis Charlie Hebdo
Just links to my most recent Craigs List Snowcat search. You'll find cats for sale (but not over $20K, my limit ), cats wanted, grousers, Ford 200 engine, and even a guy near Flathead Lake that will 'work for a snowcat'! 
I searched so you don't have to!!
http://buffalo.craigslist.org/rvs/946045625.html
http://burlington.craigslist.org/rvs/974615865.html
http://denver.craigslist.org/cto/966025847.html
http://eastidaho.craigslist.org/rvs/974013549.html
http://maine.craigslist.org/rvs/969731769.html
http://minneapolis.craigslist.org/rvs/977646298.html
http://minneapolis.craigslist.org/rvs/958162589.html
http://minneapolis.craigslist.org/rvs/958071731.html
http://montana.craigslist.org/bar/960017273.html
http://montana.craigslist.org/bar/957606067.html
http://newjersey.craigslist.org/cto/960029486.html
http://nh.craigslist.org/rvs/973020160.html
http://nh.craigslist.org/bar/948362704.html
http://pueblo.craigslist.org/rvs/949897261.html
http://pueblo.craigslist.org/pts/949893504.html
http://reno.craigslist.org/for/964038814.html
http://sacramento.craigslist.org/bfs/971107354.html
http://salem.craigslist.org/rvs/953154098.html
http://saltlakecity.craigslist.org/rvs/978250714.html
http://saltlakecity.craigslist.org/rvs/971229705.html
http://saltlakecity.craigslist.org/rvs/956068963.html
http://spokane.craigslist.org/rvs/972544034.html
http://spokane.craigslist.org/wan/965021246.html
http://westernmass.craigslist.org/rvs/964785415.html
http://westslope.craigslist.org/cto/964950084.html

I searched so you don't have to!!

http://buffalo.craigslist.org/rvs/946045625.html
http://burlington.craigslist.org/rvs/974615865.html
http://denver.craigslist.org/cto/966025847.html
http://eastidaho.craigslist.org/rvs/974013549.html
http://maine.craigslist.org/rvs/969731769.html
http://minneapolis.craigslist.org/rvs/977646298.html
http://minneapolis.craigslist.org/rvs/958162589.html
http://minneapolis.craigslist.org/rvs/958071731.html
http://montana.craigslist.org/bar/960017273.html
http://montana.craigslist.org/bar/957606067.html
http://newjersey.craigslist.org/cto/960029486.html
http://nh.craigslist.org/rvs/973020160.html
http://nh.craigslist.org/bar/948362704.html
http://pueblo.craigslist.org/rvs/949897261.html
http://pueblo.craigslist.org/pts/949893504.html
http://reno.craigslist.org/for/964038814.html
http://sacramento.craigslist.org/bfs/971107354.html
http://salem.craigslist.org/rvs/953154098.html
http://saltlakecity.craigslist.org/rvs/978250714.html
http://saltlakecity.craigslist.org/rvs/971229705.html
http://saltlakecity.craigslist.org/rvs/956068963.html
http://spokane.craigslist.org/rvs/972544034.html
http://spokane.craigslist.org/wan/965021246.html
http://westernmass.craigslist.org/rvs/964785415.html
http://westslope.craigslist.org/cto/964950084.html