Back in the swing of the Wonderfest thing for a bit. Next up we have......
The Wonderfest 2002 Artisan Wisdom Convoy Ring (aka Optimus Prime for your dirty gaijin ;D ). The ring was made of cold casted Lustrium (Sounds hot eh? No it's just a metal) and sold for a whooping 150,000 yen. Only 300 were made.
Price and rarity aside, it's "transformable". The base ring itself is the front truck cab of Convoy, when you open it downward, you can then flip up Convoy's head (inside the ring cavity reveals Convoy's famous line "Freedom is the right of all sentient beings"), and then close it up to make a "semi" robot mode.
The ring was rather large and expensive and so far I only know 2 people who got their hands on it. One of the earliest Wonderfest TF related items and atleast to me..... one of the coolest. To quote Sam's mom from the Bay movie; Transformers 2007 "It's his bling"