Well, here's one on eBay that's over a $100 right now: http://cgi.ebay.com/AU-Blank-Large-...90?pt=Coins_US_Individual&hash=item19c4f7918e
Wow that makes me wonder if the 2 cent blank that was offered to me was real or not. A small time dealer wanted $8 for it, I didn't know him and there were no scales available at the time. Maybe I should of gambled on it...
I wouldn't pay very much unless the blank planchet could be authenticated. It wouldn't be terribly difficult to make one.