I got an assignment to appraise a property for contract negotiation. The seller/client bought the property less than 3 years ago. He does not want the sale history to be reported. Will I be violating Standard 2-2 if I don't report the sale history of the subject? Also, I'm not sure how to label the report as Self-Contained, Summary or Restricted Use, as the buyer will also be using the report as part of the negotiation. Any input would be appreciated.