Check in with Priuschat. It's the biggest on-line community of Prius owners. They got members from Seattle and they might be able to give you some leads on which dealers are good and which ones are not.
http://www.priuschat.com
When I bought my Package #2 Seaside Pearl back in September 2007, I paid $25,700 before taxes, title and registration. While that was decent, I think I could have gotten it for cheaper. I love my Prius though. :-)
Hope this helps.