You have several ways to determine the value of a home. An appraisal is a professional estimate of a property's market value, based on recent sales of comparable properties, location, square footage and construction quality. This service varies in cost depending on the price of the home. On average, an appraisal costs about $300 for a $250,000 house.  A comparative market analysis is an informal estimate of market value performed by a real estate agent based on similar sales and property attributes. Most agents offer free analyses in the hopes of winning your business. You also can get a comparable sales report for a fee from private companies that specialize in real estate data or find comparable sales information available on various real estate Internet sites.

A home inspection is when a paid professional inspector -- often a contractor or an engineer -- inspects the home, searching for defects or other problems that might plague the owner later on. They usually represent the buyer and or paid by the buyer. The inspection usually takes place after a purchase contract between buyer and seller has been signed.

Yes. Buying a home "as is" is a risky proposition. Major repairs on homes can amount to thousands of dollars. Plumbing, electrical and roof problems represent significant and complex systems that are expensive to fix.