Posted By: 
petecldI think you are mising the point.  The goal isn't to have a card in a holder.  
A card in a holder labeled "authentic" would(should) mean something.  Not just be a card in a holder, that's silly.  If they don't even authenticate they are a waste of time.  
Save $4 per card and buy a screw-down.  Sounds like you would be accomplishing the same as using Card Collectors Services.