Freaking expansive game priced in Hong Kong comparing with US

I was kind of pissed when I realized that the Nitendo DS game, Feel the Magic XY XX, was priced much higher in Hong KOng than in US. In Hong Kong, it was usally sold at HK$220. I finally found a store selling it at HK$190 and then brought. When I got home, I serach Amazon.com and found that the game was just HK$19.99 in US. I mean, WHAT THE ****. That's HK$16x !! There's a reason why a lot of people playing priate games in HK! Pissed.