Don't be so sure, there is a fair bit of demand out there including this board to make them worthwhile, particularly some releases. The thing about BW figures is that despite them being fairly popular, they seemed to had a massive production run as there are plenty circulating in the market and therefore with the exception of a few figures, they aren't overly expensive. The fact that they are by far more durable than G1 figures also acts to their market quantities as many samples are in good condition.
The only BW KOs that I was previously aware of were the original Rattrap. That guy goes for a fair bit of money, specially when complete. Thankfully nobody has KOed X-9 Ravage.