Wan Chan 916 Gold Price hanya RM179/gram

I was received a sms from 63839.

The content of SMS is like this:

Berita Hebat ! Wah Chan Harga Emas 916 hanya RM179 per gram (TANPA SYARAT)
Jangan Ketinggalan !! 02-04 Mac 2013
T : 012-9053133

Something, I am don't understand here.
Why the retail gold price today is 916 - RM185 per gram.
Why Wan Chan can sell RM 179 per gram ??
Is it the gold is not pure Gold ?? Mix with bronze ??

Let me check it out, what happen.