Inspectors are there to find enough issues to justify your having paid $500 for one. Usually they look for obvious deficiencies - furnace being old, termites in the crawl space, seals cracked on double pane windows, etc.
There are DOZENS of things that can happen to a house once in 10 to 20 years that can cost thousands which will not be obvious to your every day inspector:
-water ingress from
Forum:
Fairfax County General