Japan DVDs seem to be everywhere somebit expensive.
A friend of mine ordered the Gackt limited CD Set at Yesasia and was very pleased. First of all, they don't sell Bootlegs. Okay, they seem to be somebit expensier than Amazon.co.jp for exanmple, but at amazon the shipping fees are quite hight, and Yesasia seems to be good at sending with avoiding taxes and duty tolls.
I ordered the Grindhouse Double Feature 6 Disc Set at Yesasia. The price there was about the same as it had been at Amazon.co.jo with shipping fee. But at amazon.co.jp it would never get duty free ;)
And Hong Kong DVDs are not always expensive at yesasia.