This is SOOOO much BS, I don't even know where to start...
DBS and TMS (which deploys magnetic fields) are just in their infancy, use is limited and sketchy at best right now, medical evidence the same, and if any fool here is willing to believe a commercial device is already medically proven to work and pay for it, then by all means he/she deserves to be fleeced.
Even for proven technology (like, say laser hair removal), commercially available devices are just pi$$-poor weak non-effective pieces of cr@p.
But go ahead, fools, spend your money, some people in these start-ups need jobs, as well. It's a free-for-all market, and one's ignorance is another's treasure. Besides, who knows, one of you might be lucky and get some placebo effect, which is just as good as the real thing...