I think you are right Dave, my thoughts exactly. I am just wondering if the label printing via eBay isn't directly linked to Australia Post, and it is they who have to increase the costs at their end.(this would seem logical to me, as I can't see eBay setting something up with the identical information as AP, just so sellers can print labels) The reason I am thinking this is because the tracking number is sent or received? by AP the minute a label is printed. Also, if there were any demand on me (as a seller) to pay the difference, then I would be doing that, but also complaining to eBay that prices hadn't been updated. I find it convenient to print labels, as I can have family members drop the parcels in at the Post Office. If paying over the counter, I would do it myself, so as not to impose too much on my family, who are busy people. Not that they wouldn't do it, but it is a hassle working out how much money to give them, or they pay, keep track, and then I fix them up after. Also, if sending more than one, have to make sure which tracking number belongs to which, and for someone like me who wears glasses, those long tracking numbers are a pain to upload.
I can't see that sellers should be held accountable for others not doing their jobs, and I'm sure that parcels would still go through, as they just scan the label, so presumably the label would not allow to be printed if it wasn't correct, and if someone did scan it and say it is the old price, they would have to then go back and see when it was printed.
