My friends and I are doing house hunting now and when compared notes, we found that very so often the developer selling psf is used as a reference. Understanding that there are flippers or original owner who are trying to cash out.. but when the property market was booming developers priced their launches so high they have money coming out of their ears.. and flippers or first owners were willing to pay those sky-high psf prices.. hence we think using developer selling psf is not relevant.
It is definitely true that a big majority of the sellers now are not realistic.. you can be making 100 calls today and all 100 will most likely still be quoting sky-high prices. We believe the strategy is to counter this is to ask really low and see who blinks first