Working up a "fair price/value" takes access to real estate records and some reasonable past experience.
- Location and year built
- The total acreage or lot size
- The number of and types of rooms
- Structural details, such as insulated versus single-pane windows, type of heat and air conditioning, size and type of garage, basement, fireplace, etc.
- Facts about components, such as the types of flooring installed Overall condition of the structure and its components
Price (adjustable) Terms (low down payment, non qualifying contract/mortgage) Condition (remodeled or "as is")
Location (sorry, it's where it is)