[Afton]

I mean, you could have bought them. Tried them out while in the store, then returned them if they weren't to your liking. But I'll admit that might be more overhead than you were hoping for. But it would also be a great way to communicate to the store that their policies are bad. "I'd like to return these. Nothing really wrong, just don't like them. Oh, and I'd like to try...I mean buy these headphones. ... Actually, I'd like to return these please [etc, etc]

[ciupicri]

You're assuming the store would accept the return and even if they did, they might not do it for the same price; a (restocking) fee might be charged.

[Afton]

I am assuming that. In most countries it's required that you can return non-consumable items in a sensible time-frame. Restocking fees vary in legality, but typically need to be disclosed before purchase.