The one rule
Never defend the number.
Defend the evidence.
A seller who challenges your figure is not challenging you. They are challenging a comparable, a floor area, or an adjustment. Find which one, turn to that page, and answer it. If they are right, change the figure and say so out loud. You will have won more trust in that moment than any pitch could buy.
And when the evidence is thin, say the evidence is thin. The confidence score is on the page whether you mention it or not. Mentioning it first is what separates you from every other agent who has stood in that hallway.
Evidata reports are evidence-based market appraisals. They are not RICS Red Book valuations, surveys, or legal advice. Every report is produced from public records and the information supplied, and is reviewed by you before it reaches your client. Four sections cannot be switched off: the cover, the headline figures, what we checked, and the limitations statement.