This is the best place to look for indicative Camera / Lens prices in Hong Kong.
Welcome to YG Billy's World of Photography
Billy updates most prices every few months. As of December the D90 kit was listed for 8,680HKD. However, in February Nikon has raised prices on all lenses and bodies because of the strengthening Yen (and actually I heard they will be raising prices again in April on all accessories...batteries, cables, etc). It's definitely worth shopping around. I do not recommend Fortress for your camera purchase (their prices are ALWAYS higher than any reputable camera shop in HK....and yes that's even after the 5-10% haggle discount). Sticking to chain stores I would recommend Broadway (much better prices than Fortress for camera gear in my experience). Otherwise stick to reputable shops either on Stanley Street on HK Island or in Mongkok in Kowloon. Looking at the price increase, the price in your home country may very well be as good or better than HK. Shop Around!