Were these actually released as "proof" cards in a product, or did somebody find a couple uncut sheets and cut them into card-sized pieces to sell on eBay? If they weren't actually issued, then they probably shouldn't be listed.
If they were issued, then they should be listed under the product they were inserted into. I doubt that they were inserted into the candy packages that the lids were on.
-Tom
Ted Musgrave card collection 98.9% Complete: Cards Known: 1013, Cards Owned: 1002
I prefer the company of people who disagree with me for the right reasons over the company of those who agree with me for the wrong reasons.
