Over-priced craft beers.
Over-priced Record Store Days records.
Unless you are rolling in it, sometimes you have to be able to see the hype and get past it before you can determine whether or not it's a waste of money or a worthwhile investment. That's not saying there's not any value in either of these products. Both can be a very enjoyable and a high art form but neither are truly necessary.
As long as one is only dipping into descretionary funds and feels that portion spent is worth it, than so be it. My point has to do with the over-pricing. Have no desire to get into an economics discussion about this and it could pertain to everything mentioned in this thread. Only saying that sometimes both these products manage to work their way over to the 'waste of money' list after the hype wears off.