Horrible price for Memory Stick Pro (Duo)

I had a slight intention to buy a 512Mb (or even a 1Gb) Memory Stick Pro Duo for my NX70V so that I can use it as a scale downed PVR. But once I realize that a 512Mb SD (HK$330) cost half the price of a Memory Stick Pro Duo card (HK$660), I was totally pissed, and rather save the money to buy something else. Sony, you suck, and you go to hell.