or, collectable pins, as seen on seibertron.com.
Listed on Amazon Japan and releasing November 30th:

A box of 19 traditional style pins listed for ¥ 6,805



And a box of 15 movie style pins for ¥ 5,104



Amazon.co.jp won't let me ship these to an Australian address though, :/ I hope these get listed somewhere else because I really want those car boobs.