As a seller, I have just had a problem with postage cost. The cost stated by eBay, once my item was sold (based on its dimensions I gave in my listing) was not sufficient. Once packaged up, the item was of course, larger and heavier than prior to packing. Postage was therefore significantly more expensive. I messaged the buyer and she requested cancellation of the purchase, which I completely understand. She was unable to cancel as a buyer as she had already paid eBay. I therefore had to cancel the transaction.
I hope I do not get penalised.
How can this situation be avoided in the future? No seller would wrap up an item before it is sold. EBay's cost estimate should be not given until after the item is packaged up. How can I add the final dimensions and weight once the item has sold?