I have haven't heard of them until now actually, so I can't say that I have had any personal dealings with this supplier. But I did a background check for you and all the signs are pointing towards the other direction. I mean, personally I would not recommend this supplier to you.
And why wouldn't I? Because...
* Their site was registered just last April 2009, ideally it would be best to deal with websites that have been online for at least 2 years.
Domain Name: HONGKONGGOLDKING.COM
Registrar: XIN NET TECHNOLOGY CORPORATION
Whois Server: whois.paycenter.com.cn
Referral URL: Link hidden: Login to view
Name Server: NS1.168DNS.COM
Name Server: NS2.168DNS.COM
Updated Date: 28-apr-2009
Creation Date: 28-apr-2009
Expiration Date: 28-apr-2010
* They use a free email account for their contact email. Legit suppliers will use domain based emails and not that of yahoo or hotmail.
* Don't be deceived by their name, they are not based in Hong Kong rather in in Shenzhen, China. So, that lessens your chances even more in getting authentic brand name products.
* I was unable to verify the method of payment they accept, it wasn't mentioned anywhere on their site. Remember to always safe payment methods, so you can do charge backs in case the transaction goes sour.
Hope this helps. Cheers :)