Real estate Project Price

Hi Guys, I have been getting exorbitant quotes for real estate projects across Bangalore. However, I have noticed an interesting scenario - when I look at last transaction prices through 99acres, housing.com or zapkey then I notice that the actual purchase value is significantly lesser than quoted price. Has anyone else noticed it and can we believe the past transaction numbers quoted in these sites. For eg. Projects having quote of around 1.25 cr for 2 bhk have previous transaction prices less than 1 cr. Can anyone confirm the veracity of these numbers and negotiate to get better deal?