I just recently went through my '56 Topps set card by card looking to upgrade.   I found 12 cards to upgrade and here they are. All 12 were upgraded due to very minor creasing - no heavy creases - just minor stuff I missed when I initially purchased them.  
Bidding starts at $1.  Any increments.  Ends Sunday, June 10th 10:00 CST.  Buyer adds $2 shipping.  
Cards: 43, 44, 45, 46, 51, 52, 53, 63, 69, 167, 178 and 231.
 
