Quote:
unless your a rock star or serial killer it probably wouldn't end up on eBay
If you read the pages of terms and conditions from any of a number of the websites that offer these personalized postage stamps, they specifically prohibit using images of any celebrity, politician, criminal, etc. In fact, you can't even use historical images, or any printed text that may have come from the internet, assuming that all such items have some copyright protection unless you can prove otherwise.
As suggested above, it's highly unlikely any personalized stamp will become that valuable that it will show up on
ebay as a rarity, but even if it should, there are so many disclaimers on the websites producing the stamps that you would have little chance of making any claim of privacy out of it, so it's essentially free reign for anyone interested in collecting them.
I know a lot of people use these stamps for announcing a new baby or a kid's birthday or a family vacation, as it is assumed these premium cost stamps would only be sent to a family member who may want to retain the stamp as a keepsake, but there is also no recourse should it wind up landing in a lot of kiloware sometime later.