Auction Problem?

So i am selling a few stacks of copper bars, people have bought them, but the transaction is not happening, i fear that the mailbox will delete the gold before it is delivered to me, any help with that?

Update 1: 3 other stacks have been bought from the auction, i have received the gold normally, any reason for why the other ones did not deliver in time?

Do you mean there's no gold in "Sale Pending" mail? Those mails will never have gold inside of them. You'll get new mail with the gold.

Thank you for the info