It's not that cut and dry. You need to consult a lawyer. In general, photography law permits you to take and use a picture of anything not "national security" related. If you have permission to stand there, you can take a picture there of whatever it is and sell it. Even if you don't have permission to stand there, you can only be charged with trespassing, there's no law that says you can't take a picture of something and sell it. However there are exceptions. You can't take a picture of people doing private or personal things, whether it's conducting business or having dinner in a private home or whatever. Some objects are trademarked and cannot be reproduced, and this would apply to the masks. You can get sued for making an album cover with the mask. That said, you ARE allowed to make a satire of Michael or Freddy in this case, and that's okay so long as it is a satire and not a re-make. It has to be a *clear* satire though.

Does that help?