This gives you a chance to make repairs or to adjust your asking price accordingly.
Many states require sellers to make full disclosure of any problems with the house.
Your inspection results may surprise you. Older homes may have asbestos, lead pipes, or lead paint. Pests, especially termites, can do lot of damage before they are discovered. To find a good inspector, ask friends and colleagues who have sold homes in the area. The inspector should be bonded, licensed, and insured.