WELCOME to LawnWorld...
I'd guess that it is a 2005, That was a residential model.... Never sold is not the same as Never Used, It could have seen a lot of demo or loaner use in the past 8 years... I couldn't find it to be worth $5k...
Is there a Kohler or Kawasaki engine on it?
I also would find it Hard to Trust a Dealer who could not determine the year of manufacture...:smile:KennyV