People trying to sell mirrors accidentally take the best selfies

Taking pictures in front of mirrors in this day and age of selfies is nothing new. But is there a way to take a picture of just the mirror?
There's not really a neat way to take a picture of a mirror without awkwardly capturing your reflection or using an extreme angle. But, as pointed out by @SilviuMajor on Twitter, when the object of your photograph is actually the mirror itself—like in a  sales posting on craigslist—the results can be a bit awkward and a bit hilarious. L