The only Buyers for the gold in the quantities some dealers purport to wish to sell are banks and perhaps some governments. None will comply with their demands in conflict with their legal responsibilities.
Unwarranted Reliance on Hallmarks and Misunderstanding of GLD
As I am sure you know, but just to refresh your memory, for buying and selling purposes there are only two kinds of gold, “Good London Delivery” qualified gold, and all other “said-to-be-gold.”
If your seller states that the gold has “internationally accepted hallmarks” and that it is “GLD.” There is no such thing as an internationally accepted hallmark. It is a internationally recognized hallmark. It is not the hallmark that is accepted. It is the chain of custody that is accepted.
For GLD gold, the chain of custody begins when the following steps are completed: