I assume that you are talking about in Washington and not Florida.
If you are talking about The Boat Tree in Florida, I bought a brand new boat from them in Orlando back in 1996. They did every annual and every bit of warranty work or other maintenance on the boat through 2004. When I scheduled to have the annual done in 2005 they told me that they no longer would perform maintenance on a boat more than 8 years old. I was a little put-off since I guess that I had spent $30,000+ for the boat and $15,000+ on maintenance, accessories, etc. None the less, I took the boat to another dealer and bought a new boat in 2006, but not from The Boat Tree. The same dealer owns The Boat Tree in Jacksonville and Daytona Beach.