I just ordered some new "domes" for my girlfriend's hearing aids (not a musician but went to too many rock concerts in her youth and was right up front near the huge amplifiers) and they included a flyer for the same type of hearing aids that cost her that 15X you are talking about, except theirs are only $249. . . made, of course, where the one's you and she pay 15X for are probably also made, in China. Specs seem to be the same. Look exactly alike and the "domes" are factory originals for the 15X ones. I suspect the hearing aids are factory originals too. She got her hearing aids at Costco on my membership. Work great. Digital, with Bluetooth connectivity (easy iPhone and Android settings and control) to cellular phones and other devices. Go figure.
$249 is even a stretch for me...but if they actually WORK, would be worth it.
I'd say "I hear you" but I would be lying. The stupidity of youth:
I'm surprised I can hear anything. The constant tinnitus is a problem, though.