Wow... he auctioned off some test-shots and design drawings too, and one sold for about $530!
Now THOSE are toy design drawings, drawing every little part for construction... not character artwork that most of the Hasbro "designers" draw of the two modes for the TakaraTomy designers to engineer into a convertible toy.
It amazes and impresses me how well these toy designers can visualise these things in 3D on their 2D drawings, and all the parts needed to make it possible.
I'm surprised he was allowed to keep or sell those things, as the designs and prototypes would be the property of Hasbro & TakaraTomy.