The purchase price of the house keeps being mentioned so it is $175,000 (25 year old house), so $1600 isn't alot, but I like to check things out before I agree to anything. Your comments have been very helpful. I thnk the mold isn't too serious since the inspection report doesn't sound alarming. It states "Mold was found on the under side of at least half the roof sheathing. This may be due to excessive humidity in the attic. It is recommended to have a cleaning and restoration company specializing in mold treatment evaluate the attic and make recommendations regarding treatment of the mold and identification of the source of mold. Also, consider improving ventilation in the attic and reducing humidity in general in the house."