Both sleds are 1997's both in great shape the Polaris has just over 4000 miles on it and the ski-doo has only 2400 miles on it I don't know much about the ski-doo except that it's a 670 and runs great I bought it with a package deal with another trailer and Polaris sled I'm not a ski-doo guy I just wanted the trailer and the other sled that came with it I have no need for 4 sleds I do know the Polaris runs excellent my son road last year up north and put on just over 450 miles on it .the ski-foo is missing the front bumper they can be purchased on eBay for about 50 dollars or less the trailer needs a little love I brought it home from Sandusky Ohio which is a little over 180 miles to my house and had no problems what so ever just needs some lights fixed the trailer is a northern lite all aluminum