Interesting, never thought about an extended warranty on a tractor before......
I guess it all depends on what it covered and how much it cost.
Have you had any service issues with it?
Has the dealer done any service/maintenance on it for you and did they do a good job?
Are you somewhat handy with a wrench?
For me to be interested in one it would have to cover everything except the tires, battery and other normal scheduled maintenance items and be dirt cheap
Perhaps someone will post with some experience with one.