Price it
Three comparables, one measure. Set the subject property against the market by the metre and read the gap as a number, not an opinion.
The three comparables
3 of 3 comparables carry a usable rate.
The method
Each comparable price is divided by its area to give a price per metre. The average of those rates is applied to the subject area to give a fair value, and the asking price is read against it: above it the listing carries a premium to its own comparables, below it a discount.
