Sorry to interrupt it to you yet maximum digital products in Hong Kong are retailed cost and in case you calculate it, it relatively is purely like some money extra fee-effective. you will discover digital shops at any mall.
Check the computer malls in Wanchai and Mong Kok (where local get their electronics). If you can, stay away from electronic stores that target visitors and tourists, ie. stores in Tsim Sha Tsui.
there are lots of computer malls in Wanchai, which is a small town in HK. the names of the computer malls: 188, golden computer mall... etc. and the computer malls do not just sell computers. they sell laptops, ipods, ipod accessories, mobiles, keyboards, laptop cases, mouses, all things electronic-y. but not huge items like fridges, air-cons.