I have several sets of earphones and these ones have to go to make way for new purchases.
I’ve owned these Etymotic ER4XR earphones from new.
Originallly cost £320. Complete with original packaging and accessories. There are extra foam tips and two sets of triple flange tips. Carry case, filter cleaning kit, 1/4 plug adapter etc.
Literally the best noise isolation possible in an earphone.
Selling for £120 Inc insured postage.