This part of Oregon has generally been a Seller's market since around 1986. In 1986 the market reached its lowest trend since a slide in market values began in the late '70s and early '80s. In the early '90s the market values had regained fully, matching their values in the '80s.
Land use laws which limit development.
Increasing high tech employment opportunities. You can be at the Pacific Ocean beaches in just over an hour. Downtown Portland offers all the urban amenities within an hours travel. Snow skiing, mountain trails and isolated fishing is also with in an hour to an hour and a half drive. Highly rated school systems.