I'm particularly bothered when somebody gets an autograph and tries to sell it. I got a real hard nose policy because even one of our lunar landing colleagues sold some stuff that our crew gave him and that really burned me up. I tried to buy it back on the open market. It was a flag that had been to the Moon or around the Moon and autographed by the Apollo 8 crew. Next thing I know, it was for sale.
And it even had, I won't say the name, you might guess who it was, "To so and so, thanks for all your help, Frank, Jim and Bill."