94085 zip code in Sunnyvale is approximately the area between central exp, Lawrence exp, 237 and 101. This area is about $100/sf less expensive than 94086 and 94087 zip codes in Sunnyvale. Houses are slightly older and smaller than other parts of Sunnyvale. The neighborhoods are a bit run down compare to the other parts as well. However you can find pockets of homes in the 94085 zip code that are very nice.
Hope this helps. I'll be happy to provide more details if needed.