guidlines for comparables

[jmello6]

What are the appraiser's guidelines in using comparables? My appraiser says that he can only compare the 1920s bungalow I am purchasing to other houses of that era. Doesn't the value of the home depend more on sales in that neighborhood than 1920s homes in other neighborhoods? I cannot imagine that my bungalow will be worth much more than other homes on the street and immediate neighborhood just because of it's age. I am being compared to homes in much better areas with only a 25k decrease just because it is a 1920s bungalow. Thanks