Plenty of fraud/shills on 55 Clemente too. If you spend some time on VCP with any decent card that has shot up over the past several years you will find the same old crap. Seriously, this didn't just start this year. The market manipulation and fraud has been going on for a while now.
Anyhow, for the Clemente you only need to look at the last Probstein Auction 11/7/2016 and the PWCC auction on 9/11/2016. Same exact card (same psa cert) and the winner of the PWCC auction was bidding up his card in the Probstein auction. He/she lost $2,387 before any consignment fees or over 20%. I say lost, but I doubt he really lost anything...
Keith, you mention A***T, but the guys who are shilling is a lot more than just that one guy. E***T (563 FB) / E***M (3309 FB)/ N***N / N***l (282 FB) and the list goes on and on and on.
PWCC 1955 Clemente Auction 9/11/2016
http://www.ebay.com/itm/1955-Topps-R...187?rmvSB=true
Probstein 1955 Clemente Auction 11/7/2016
http://www.ebay.com/itm/1955-Topps-1...522?rmvSB=true
Another interesting fact that doesn't prove anything by itself, but still interesting nonetheless is the fact that if you look at the last 60 1954 Aaron auctions in PSA 7, only 28 are unique PSA certs. Over half are the same cards bouncing around -- 15 to be exact with some being "flipped" 4 times. Same bidders bidding them up (many with multiple retractons and high % bid activity with same sellers). It's laughable. In fact, you'll find some of the 15 listed on Ebay right now -- some even at lower prices than they were bought. I'm sure you'll see the same with Clemente and others.