Back in the third world I remember my parents looked up the reference price per m^2 in the area and would divide the price by that to estimate the size. Advert

Back in the third world I remember my parents looked up the reference price per m^2 in the area and would divide the price by that to estimate the size. Advertised amounts would be off by 20-25%. When you confronted them about it realtors would just give you the real number, I guess most people wouldn't go through the trouble so it was worth trying for them.