If you use eBay labels, my advice is still to open an Australia Post click and send account when you have some time up your sleeve.

Will save some stress down the track if eBay is glitching and you can't print a post label, or pays by bank deposit and does not got through check out (which means you are unable to process a label usually).

If you print eBay labels having a spare printer ink cartridge can save stress too - been caught out a couple of times with that myself