If there are comparable homes that recently sold in your subdivision or street for that matter it should not really matter what homes outside of your subdividion go for unless the appraiser is having a hard time getting an accurate price. I would not worry about it. Appraisers do not use program algorithms like Trulia and Zillow. They have to get actual properties to compare to, to get an opinion of value, so you will not have a problem with those. Plus, you can always disagree with an opinion of value. I have done it several times. If the apprasier is lazy or does not know the area you can get another appraiser to challenge the first one. All an appraisal is, is an opinion of value of a specific property at a specific time.
If you need an appraiser let me know. I have several good ones.