There were rumours flying around everywhere a couple of years ago that many of the hets were culled because there were too many to look after in the collection they were in and they weren't selling for as much as was being asked. (No, I can't confirm it, they're just rumours that everyone listening at the time heard as far as I know). If people have been breeding them to their full potential, which you'd presume to be the case, there would be a heap of them out there by now, but like chondroes etc, being kept quietly.
Does anyone remember how many were being offered in the original auction? It was either 2002 or 2003 that they were up for sale.