Not one item that I post leaves here without FRAGILE stickers.  Whilst AP do not offer a fragile service, it is a buyer expectation that the box their fragile item(s) is/are in is appropriately marked.

Like Catspj's - I haven't had anything broken by AP, and particularly so since I started using the FRAGILE stickers.

Just for info - I used shredded paper as packing, and stuff the main box so that there is no movement at all.  You can get a cheap shredder at AP and I would think Officeworks as well.

Also (as mentioned above) take 'stage' photos right through to the finished box.  If the box contains several items, or is very expensive,  I email the photos through to the buyer pre-postage, so that the buyer can clearly see that I have taken every care possible with their items.  Plus it is good evidence for AP should the unthinkable happen.