So 3 bucks to get 2 sent to Au?
Sweet!
Hey phoenixsilverbird, I dare you to do a better price!
I can.
A sheet of paper costs around a cent or less, on which I can print out 3-4 of these.
Then I simply adhere to the surface with some double sided tape or normal tape folded over. Most people have this at home but if not, a roll costs a couple of dollars which can be used to make 100s of these signs.
Add this to the few minutes of image editing and searching google images (do you want to include computer power costs, a thousandth of a cent for 10 minutes computer time?) and blam you are done.
For the optional weather-proofing, just laminate the paper using a laminator at a work office or copy shop. Let's say you pay 10 cents to use this service for an A4 page plus the cost 0.27 cents for an A4 laminate pouch. (Bear in mind we can make 3-4 stickers with one A4 page).
So in all, the cost per sticker is <10 cents!
That's a minimum of 89 cents less than the OP's price.
And no, mine doesn't come with UV protection but you don't need it, it's so cheap and easy to replace these once faded by the sun!