Good question I actually have no idea what its worth. I haven't seen anyone sell the gold coin itself below 2k$ bit then again I haven't actually seen one sell for that price either (ebay sucks ). What I know is that the 2013 version was very limited and bought up by traders with the intent to resell.
I would expect the complete set to be worth around 2500$ considering that the set without gold coin sells for around 1000 and the gold coin gets bids around 1500.

Cheers