I might be able to get you the gold coins/biscuits at below the market price but you dont take the receipt when buying. The problem is that when you take the receipt its adds up in the tax that the seller has to pay to the Government. Moreover dont buy gold ornaments /jewellery in Qatar as you can get better designs in india. plus the gold prices are very high at the moment so think agin before you go on a gold buying spree.
the best place to buy gold would be behind Alfardan Centre in front of the Karwa stand. You will see 100s of gold shops there. I suggest that you do not buy from Alukkas and Damas as they charge a very high "making" rate. If you know anyone who has a gold shop he might get you very good deals. You might be able to get "old gold" from people who sell. The people who sell gold to the shop owners just get gold price and they never get the "making charges". Any more questions i will be glad to answer them