there is a wife signed marciano on ebay right now, i am trying to get it removed., maybe it is the same postcard, or a similar one, but definitely no good.
http://www.ebay.com/itm/ROCKY-MARCIA...item19c8038e0e
but ebay is slow to respond, most of the time i report something with proof, not just specualation, it just remains up, very frustrating. (sigh!)
there is also a marciano preprint on ebay.
http://www.ebay.com/itm/Rocky-Marcia...item2566beb959
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http://joeheavyweight.com/rockymarciano.aspx
both of these examples are on my marciano page, near the bottom.