They have been pumping out these Pantera forgeries for the past few months. Once one autograph sells they wait a few weeks and a new one is listed. As a person who has known the band for quite some time and I have handled over 1,000 autographs from this band. I can assure you these are 100% not authentic signatures. 

And from looking at their history and what they currently have listed you can see most are fake / forgeries. 

http://www.ebay.com/itm/350828310078?ssPageName=STRK:MESINDXX:IT&am...

http://myworld.ebay.com/mommyzrocknroll/