Not knowing anything about those boats, but knowing something about the market, I'd guess
that it's primarily because of the seven years. There seems to be a general perception in the market that newer=better, but I've yet to see any real evidence that a 35 year old boat is intrinsically any more decrepit than a 25 year old one, assuming equal levels of maintenance
. What wears out in 35 years that hasn't in 25?
Of course, I may be completely wrong about this particular situation. I do know that Gulfstar has gone through some good engineering years and some bad.