For those of you that may be interested, I am in the process of listing an interesting collection of new and unbuilt motorcycle models on EBay, including several rather rare items, from Protar, Tamiya Motorcycle Model Kits - 01-22-2019 , Gunze Sangyo , others, and [B]BRITTEN.
I collected them all over the last fifteen years or so but am no longer in a position to build them to the level that they should be, so am offering them to those that will.

You can find them by starting with my Protar Honda 350cc Six Cylinder RC174 - EBAY Item ID: 264148023682, and go to "see other items" from there

Uncle Buck