Because he is not a buyer, he is a seller.
Sellers are allowed to cancel their listings at any time.
Sometimes it is because the item has been lost or damaged.
Sometimes they are afraid they will not get the price they wanted, even though most bidding happens in the last few minutes of an auction.
Sometimes they learn that what they have is better than they thought and want to rethink their marketing strategy.
But sellers are allowed to protect their stock in trade. It 's his until you pay for it.
