I buy headphone cables based on how nice the cable feels, if it transmits noise when it rubs against stuff, and how well the connectors fit into the devices I am using.
My favorite is when people get picky about cabling for digital transfer. The ones and zeroes either get there or they don't, nothing in-between. They work or they don't.
I think the best thing to do is to assess your ability to hear difference. I can absolutely hear the difference between my Bluetooth earbuds and a decent wired IEM, so I use wired headphones for listening to music. I CANNOT hear a significant qualitative difference between the $25 Chinese IEMs that I use and more expensive options that I have tried, so I use the cheap ones.
To be sure, there ARE perceptible differences between wired headphones, but those are more a matter of EQ and personal preference. I can achieve my maximum perceivable level of quality with pretty inexpensive hardware. It doesn't mean that other people cannot, that isn't my problem.