This is the worst possible time to shop for a snowmobile! Prices are highest during the start of the winter, and now with covid, add $1000 to anything out there.
You will need to educate yourself on maintaining a snowmobile, they are high maintenance machines if you want to be reliable.
Things to avoid: machines with silly bar risers and Monster energy stickers. Every teen ager that pounds a machine off jumps does these mods! Also, stay away from adds that say " ran fine when parked" if it ran fine, it wouldn't be parked!