Not only do I agree with the reporting the sales history for the past three years--I have already been doing it for all the years I have appraised in Arizona and California (New Mexico is a non-disclosure state and twenty years ago there was no information!). It provides more information about the property, the neighborhood, marketing trends, etc. It just simply makes a better informed appraiser--not only for that specific assignment but for the market overall. For example in a tract subdivision, it so happens that the last sale for the subject and all comparables occurred the last time about 4-5 years ago in the same value range--now today most are still in a similar value range--one sticks out, you start searching why, it has been added on to or pool added or something is fishy about the sale. That red flag might not have popped up if you hadn't look at the last sale for each comparable. The new USPAP requirement is to the benefit of the appraiser in the appraisal process. If it alerts the appraiser to a scam going, all well and good, but the process is all part of due diligence!! So as I mentioned in another post, if another appraiser or reviewer or most important your state board is able to do a three year history of your subject and all comparables---DO IT! And USPAP does have an out, if that information would not be readily available to anybody.