Neuropathy Relief Centers: Is the price worth it?

I've been suffering from peripheral neuropathy for the past 5 years. Started in the toes of my right foot and has been steadily rising up to my thigh. The numbness, tingling and burning sensations have been driving me crazy. And now my balance is getting so bad I'm careful not to fall over. Even driving is becoming difficult as I can barely feel the foot pedals. All doctors have told me that there is no cure and that it will just get worse with age. They prescribed Gabapentin and my neurologist suggested spinal injections which I do not wish to pursue. 1'll soon be 75.
Now I've recently come across a Neuropathy and Chronic Pain Center in Connecticut which claims an 80% success rate with their patients. They use SANEXAS and other electrical stimulation devices. However they do not accept insurance and patients have to pay in advance out of pocket. The price tag is hefty: over $6,000 for 16 sessions. Does this sound outrageous or reasonable? Any opinions would be welcomed!