Thank you for taking the time to share your thoughts and insights, this is very helpful.
In my continued research of this topic, I was able to find a slightly more definitive statement in the Yellow Book which indicated that using the prior sale of the subject as a comparable should receive the same consideration as the other comparables.
I guess that can still be open to interpretation. I am choosing to interpret that to indicate that the prior sale of the subject can be used, or should be considered, as a potential comparable if the prior sale date falls within the same time period of the other comparables being considered. Scope of work generally defines a market area and time period to be researched for comparable sales.
It seems to me to be consistent with the Yellow Book guideline to place using the prior sale of the subject as a comparable within this same time period. If comparables are being considered during a two or three-year period prior to the effective date and the prior sale of the subject was five years prior then using the prior sale of the subject as a comparable would not be the same consideration, it would be special consideration.
The scope of work could be changed to five years so that it included the prior sale date of the subject. However, the decision to expand the scope of work to cover this period would need to be made based on the totality of all comparables, and making the decision solely for the purpose of using the prior sale of the subject as a comparable would also be giving the prior sale of the subject special consideration.
Granted, this single statement in the Yellow Book to reach a time period conclusion is a bit thin. However, it does encompass many of the “it depends”. If there is an abundance of great comparables within the past six months, then using the prior sale of the subject from a year ago could be inappropriate. However, suppose there are so few available comparables that the assignment requires the use of comparables with a sale date ten years prior to the effective date. In that case, a prior sale of the subject occurring ten years ago should also be considered a potential comparable.
Where are the flaws in my logic? Does anybody have a different interpretation?
Thanks again for sharing your thoughts.