Yup, that is a nutty vehicle!
I had never seen one until modelling buddy Mr. Fujihara brought his diorama to "The 17th Armour Modeller's Conference in Kansai" last September, where he took the Bronze Award.
Here are a coupla pix:
Like Norio, who participates here at FSM, Mr. Fujihara is another of the masters I get to learn from! Lucky me!
I'm sure Mr. Fujihara will be pleased to hear it's selling for 400 bucks, since I think he got his for about 1,500 yen (about $13 USD)!
Either he got a great deal, or that seller's off a decimal or two!