So, my friend and I make mirror masks that look similar to the one Lady Gaga wears, and we've sold a few on ebay. Someone recently asked us to make them one, and is willing to pay our asking price. However, I noticed that they have recently purchased tiles that look like the ones we use to make the mask. I know there are legitimate reasons one might want to do this, but is it possible that its something less than legitimate? Or should I just not waste my time worrying?