It's the same for postage times.

Getting marked down for Australia Post's slow delivery is unfair, but hey, what can you do?

Some times you cant win  

No matter what you do with regards to postage you will receive complaints.

I have received complaints when I have combined postage and reduced it down to less than what the postage is for 1 item - and charged less than it actually cost to post the item. I have received a DSR of 1 for postage cost in this situation as well. (Yet another aspect of the feedback system that doesn't work). Just goes to show no matter what you do some buyers will never be happy. Thankfully their are in the minority. I don't think many buyers know how much postage costs, and given the cost of registered mail, tracking etc isn't included on the AP postage labels and satchels don't have prices printed on them how are buyers toknow what is reasonable. 

You need to do what works best for you. If you have a lot of buyers that purchase multiple items and you offer a combined postage discount and decide to incorporate part of the postage cost into the item price, this will result in them paying more for their items in total. If you typically sell single items then it won't make much difference except your FVF will increase slightly.

I was marked down on postage cost the other day by a buyer in country WA, I had set a flat rate of $20 (was willing to take the hit if someone in the middle of nowhere bid) and it cost me over $40! Some people cannot be pleased.

Funny thing tho - if a buyer has to 'return at their own cost' for a paypal claim - they are quick to run here and whinge about the cost of postage then. I gave up trying to figure it out a long time ago 😉

In all the time I have been doing ebay that comment or negative left after the person has paid for postage I truely find that really unfair why buy then leave neg ! I noticed many sellers write in their listing please dont buy and then complain  postage was expensive