So, I managed to completely miss the upcoming changes to Auspost costs until today. Not happy... 

Regarding letters, does anyone know whether ebays 'estimated delivery time' will be based on the priority service or the standard service? Are we going to end up forced into using priority stamps to get our items there on time?

It looks like I'll be going to parcels for most of my heavy items, no sense in paying $5.00 for an untracked letter instead of $7.00 for a tracked one. Just trying to figure out what to do with the light stuff.

Also, does anyone know whether printing an ebay postage label will count as shipped on time, or does it specifically need the scan at the post office? I have had far too many parcels arrive late to simply trust the delivery scan, but I'm not happy at the idea of having to line up at the post office to have all my parcels (around 30 a week) scanned either.

I just can't get over ebay's quote on their new shipping rules

"Late Shipment Rate is a new, more objective measure in place to encourage you to use tracking and where you do, reward you by measuring delivery performance based on what you control: sending your item on time."

That sentence, right there, acknowledges that having buyers control whether an item was sent on time is a bad thing, and they're 'rewarding us' by not subjecting us to it if we pay for tracking (i.e., a parcel). Sigh.