Gym apparel and gear is a huge market. Nike is pumping out a lifting shoe for $200. Unless you're going to Olympics for weightlifting, the 30 minutes of snatch work you do 2x a week doesn't rate a $200 shoe. Same could be said for the overpriced gym shorts, knee-high socks, and whatever else is fashionable at the moment.
Below is the list of what I have in my gym bag. Nothing more, nothing less. Most of the items I've had for 8-15 years. Save your money and only pick up what you need.