A few years back I was asked to be best man in the wedding of my then best friend. He had a "brilliant" idea that everyone could buy a black suit for the wedding instead of renting tuxes so that they had something to keep, rather than spending $100 on a rental.
I wasn't really in a position to say no, unfortunately, so I ended up buying a $350 Jos A Bank black suit. I friggin hate it and the fact that he put me in a position where I couldn't say no. I guess the good news is that I've had plenty of occasion to wear it since I've probably attended at least 6 funerals since I bought it. The only time I wear it otherwise is the black jacket with the charcoal gray pants which were included.
Ultimately it was a pointless purchase and the money could have been used toward a more useful suit.