Buy and sell scrap gold for profit

I came across this ad on gumtree.
Any thoughts?

http://www.gumtree.com.au/s-ad/bris...ll-gold-for-profit-6-hour-workshop/1023732111

 

Here's my advice

You need to sell it for more than you paid for it.

Please let me know your billing address.
All accounts payable in seven days - Thank You

 

Would you need to be a licensed second hand dealer?
What licenses do bullion dealers need?

 

On a serious note I'm sure some of the site sponsors/dealers could chime in here and give you some idea.