This seller has some for sale
I think maybe this seller is a member here at NintendoAge.com. I mean to have seen someone listed those prototypes (at least i remember seeing a Bikermice from Mars SNES prototype) for sale here at NintendoAge not that long ago.
EDIT: i see now that vern77777 just confirmed that the seller was a member of NintendoAge, thanks for the confirmation
I think maybe this seller is a member here at NintendoAge.com. I mean to have seen someone listed those prototypes (at least i remember seeing a Bikermice from Mars SNES prototype) for sale here at NintendoAge not that long ago.
EDIT: i see now that vern77777 just confirmed that the seller was a member of NintendoAge, thanks for the confirmation