Say there are 2 apartments in the same building, same floor and in more or less the same condition. Vendor 1 wants 250k for theirs yet vendor 2 wants 300k for theirs. What information is there in the public domain to help a buyer decide which is the closer to a fair value? I see so many prices on Argenprop and Zonaprop that vary wildly and seem as if they are plucked out of thin air. I occasionally see these avg price per sq metre graphics in newspapers etc but dont know how reliable they actually are. Surely people dont trust estate agents to guide them on these matters?