Word ! We have a few... Not all in metro Seattle though.
1. CAM... Run by Andrew Klein in Federal Way. THE BEST SHOP AROUND SEATTLE! They have a website... http://www.norpac-cam.com/cam.htm
2. Another is in Belleuve. They sell DW, GJ, and Herpa 1:400, 1:500, 1:200. This is the best shop around my neck of the woods.
3. A small hobby shop called Galaxy Hobby. This is in Lynnwood. They carry only Herpa 1:500, 1:400.
4. The Gift Shop at the Museum of Flight. Prices here are high... I wouldn't suggest.
Thats all I can think of right now... Hope that helps!