On the light side I guesstimate 1500-2000 miles a year depending on where the owner lives and think about the previous winters. Also you can tell alot about a sled by what the motor and undernieth look like. But you gotta think about what has to be replaced on a 16 year old sled and the the simple things like can I/do I want to upgrade shocks, track, suspension, motor ect.
But 2600 miles on any sled isn't shiz! Just make sure $$ value is right!
And Trbo still has an 1950 sled that he rode as a kid with 110,000 miles that he still rides, yet the mules have to pull it (Heard the DNR is watching to catch him and give him a ticket for being pulled by a jack ass):roflmao: