Wait for saturday ST papers. You will see plenty of ads from resellers and SH, Singtel and M1 offers. There is no real good place to buy hp as it is a controlled market.
Of course there are bad places to avoid like lucky plaza basement shops that sells a secretly moded PSP for $$2600. Maybe that shop can custom make a $18,880 handphone with a built in 16megapixel 5D mkii sensor camera built into it. LOL