Since you have toured the property you are interested in, you should know how it compares to the general neighborhood. All you have to do is put the home in one of three categories - average, above average, or below average.
When evaluating a home's condition, there are a number of things you should consider. Structural condition is most important - items such as walls, ceilings, floors, doors and windows. Then paint, carpets, and floor coverings. Pay special attention to bathrooms and bedrooms and whether the plumbing and electricity work efficiently. Look at the fixtures, such as light switches, doorknobs, and drawer handles. The front and back yards should be in reasonably good shape.
The missing ingredient will be information on the condition of the homes from your comparable sales list. Provided you chose the right agent to represent you, they will have actually visited most of those homes and be able to provide key insights.