I saw this item listed on ebayhttp://cgi.ebay.com/1926-Sports-Co-of-America-CHAMPIONS-Uncut-Proof-Sheet_W0QQitemZ330190481108QQihZ014QQcategoryZ3171 9QQcmdZViewItemQQ_trksidZp1742.m153.l1262and aside from the price, what do you think? Are some of these cards actually unique?