Quinlan said:
The 02/03 SnoPro's go pretty reasonable. They were in the Firecat chassis, and were nothing spectacular, IMO. If you are going to get a SnoPro, spend the money for a 04+ to get a stronger chassis that is rider forward. I saw 02/03's this winter for $2000. Similarly, I've seen 04's for $2500 (though usually closer to $3000 for a true trail converted 440). Keep in mind a true trail conversion will run you $1000+ if it isn't already done for a 04+.
I'd completely stay clear of the 02' SnoPro 440 firecat chassis. Rode great. Broke something EVERY time I rode. I had a 700efi in mine, and the motor was reliable. Blew out the brakes, which blew out the chaincase ( all one piece and the brake rotor is mounted to the cog shaft ). Expensive sled to get parts for as well.
A lot of people like SnoPros, I personally dont. Although they are extremely rugged, and I loved how tough my 04' was, I must say I dont think I will ever get one again, unless its a new one ( 08+ 600 ).
If you can, stay away from the 03' Rev 440's as well. They aren't bad sleds, but they are much weaker than the 04+. Much cheaper to find any already converted 600 sled ( I paid $2300 for my mod ). Or you can get a 440 for $2000 and spend $1500+ putting a different motor in it.
Here's a video of me ripping an a-arm off my 02 1/2'.
http://www.youtube.com/watch?v=7rEuekcpMro