Paradigm Signature C5 V3

I was told one of these will be put on Ebay this week.

It seems like these are difficult to find. Does anyone know why? Also, why has the price gone up so much over the past year?
Its a pretty nice center channel, thats VERY big. Think of it as a S8 basically on its side.
How were you told that something was "going to be listed on Ebay"?