A good check is to approach a bank to get an indicative value... at least at the very bare minimum, you have an idea whether the bank is willing to match the asking price. Saves you the hassle of having to pull out of the deal later when you realised that bank is not willing to finance the purchase...
My two

is that condos in CCK area kena infected by the Mi Casa fever.... suggest you wait it out because once the fever subside, the sellers will be more realistic in their asking... unless you really need a place urgently.