Same could be argued over T-shirts and whatnot. Just depends on your target audience.
T-shirts of 50 dollars are already quite expensive. I buy them, because I prefer buying less items that hold up very well, but surely 50 dollars for a t-shirt is expensive.
In the end a lot has to do with how much you know about certain materials and styles too I guess. For example for me personally suits from suit supply are just fine. But if you really know something about suits I'm sure you want to go bespoke and pick and choose every single thing about the suit. However I think it's only advisable to go for a pricier category if you actually know what you're paying for.
The thing is though the majority of people (men especially) know fuck all about these things. Sun glasses seem a perfect market to let people play 20-30 dollars too much per pair.
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