When comparing 2008 to 2007, two factors remained constant for the Rancho Santa Fe real estate market (defined for the purpose of this analysis as all attached and detached residential properties listed with the San Diego Multiple Listing Service for the 92067 and 92091 zip codes): inventory increased (Chart B) and sales decreased (Chart D). Contrasting this year-to-year data shows that inventory was on average 10% higher in 2008, while the number of sales was 20% lower (Chart A).