Lukis Bros Transformers Collector Site
Black Optimal Optimus prototype on Ebay
TFW2005 SashaShame has listed an Ebay auction for a Black Optimal Optimus unpainted prototype from Beast Wars. This item is one of only two that known to exist, and is an "unpainted injection-molded hardcopy test shot prototype". Here is the forum thread where the news was first heard, but click the above link to view the auction and the figure in all four modes.