1: Don't go to a lions den with a meat suit on.......
2: Dont go into a free paper props thread and boast about the letters to sell the replicas of said letter to people that like to make free stuff, if someone bought one then by what your saying they would own the rights and they would have the right to post there own pictures of it.
I understand you would like to get your investment back by knocking off the paper prop and selling it as i have done that with Basilisk fangs, Rons Hero wand, and a few others.
But If I go into a free paper prop thread talking about something new Im gonna plant the seed for a select few with the knowledge and skills to knock off my prop before me.
Respectfully you should have made the copies first swooped in to the "for sale" section and sold as many as you could on ebay and here and get as much money as you can before one of you customers knock off your knock off and sell it for half as much....
Right now the envelope and that one letter are knocked off to scale already perfectly done by a professional calligraphy artist.
As for the pictures you don't own those, screen used owns them and they are the ones that have to ask for them to be taken down and really I don't think they can either since they watermarked it, they can only request when they are losing money because of or the person posting is making money off of... Free Country you can post anything you want unless it deprives the other party either financially or morally and since you don't own the pictures and her posting them isn't depriving screen used props then all is well in wonderland or Hogsmead in this case.
The part about it being knocked off already isnt true but it makes you think real hard (or maybe it has)