Different budget level, but as an iPhone user, I can’t recommend Audeze Sines with Cipher DAC-cable, too highly. Fantastically satisfying sound, and the DAC being built into a lightning cable, is superb design. They are about £450 RRP, but I picked mine up in mint condition for about 150, with the DAC as well, on eBay.
Lots of earphones on eBay are fake. If they are too cheap there is a reason. They always look identical to the real thing.
Once got some AT ones and the uk distributer confirmed they were replicas. You’d not know until you plugged them in.
I’d just recommend Audeze headphones generally. They’re leading the field with electrostatic headphone tech. They’re like audio-crack - I have no interest in regular headphones now! As well as the Sines I have LCD-2s, which are stupidly good.