Hi guys,
I had the same experience with canceling the order after 3 days. Reason...miner sold. But when I told him that this is not a way of doing business with increasing prices according to DASH increase, dude told me that he is sorry and his boss told him to tell me to cancel the order.
In my opinion sellers now use the miners for themselves like on that picture above.
The bad thing will be later when this bubble explode, they will sell again that used miners like new, under "normal prices". In no way normal miner would pay 14.000 for a giant. They increase the price to bullshit only to keep the selling post, otherwise they should delete it and make a new one when they will start to sell again.