OK, you can see by the lack of response that this is a silly thread. I'll explain in full why.
For a start, a futures contract is the right NOT the obligation to take future delivery.
The mini-contracts that most of us trade are not deliverable - only the full contracts. A full gold contract is for 100 oz. So, IF and it's a very big IF you were actually able to take delivery, it would cost you about $75,000 and come as a single gold bullion bar.
Now, do you really think that if you put that on eBay for $100,000 you'd get a buyer? Of couse not - any serious gold buyer gets it from a bullion dealer and doesn't buy 'play money' 1 oz bars or coins from eBay. There is no shortage of real gold bullion, just the tiny pieces being snapped up by a scared public.
Gold in small quantities carries a premium - 20% for sovereigns and 10% for a 1 oz coin. That, combined with the shortage results in the $1,000 prices seen on eBay.
So, the idiot that wrote the story that promted this thread didn't have a clue what he was talking about and the whole idea is ludicrous.