And how is that your buyers fault ? You listed them and you let the auctions run - it is your responsibility to supply them without some lame ass excuse.
Can you understand how this looks when the buyer (who is a member here) turns around after being told you couldn't supply the box he rightfully won, only to see you busting two tins of the exact same product ?
If the boxes had finished at a decent price, i'm sure the buyer wouldn't have had a problem seeing his boxes. But as the two boxes that you sold finished at $69 AUD & $76 AUD you are going to have a hard time convincing anyone here that the "non supply" is due to any other reason than you didn't get enough for the boxes. Pretty low act really.
How would you be if a seller did that to you ?