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Posted By: davidcycleback

The rule is that you should disclose what you did to the card and let the bidders decide what is and what is not important. If you hide something because you think people will pay less if you told them, you're being unethical.

If you write in a sale, "There was a minor pencil mark that I carefully removed" the whole debate is moot as the potential buyers will know. And in the near future looking back, you will feel good yourself because you know you did the right thing.