It varies depending on age, and size, type structure etc. Most homes are between $350- $450.
Some maybe slightly less and some more for larger homes.
Also rates will usually vary by the inspectors experience, usually newer inspectors with less experience will charge less or inspectors that are not busy and need work.
I have been inspecting full time for 20 years, Code Certifed, ASHI and NACHI Member.
Do not look for the cheapest inspection because that is what you may get.
Get the most qualified inspector with a fair price, that is what we do.