I have done over 200 ozone treatments with a unit I purchased. Although they are not on the cheap side, resale values do hold. So I probably spent about $1500 on the whole thing and 200 treatments = $8.00 per treatment. No travelling to doctors offices, no paying excessive fees just do them in the privacy of my home when I feel like doing them.
Best therapy I ever did. But you do have to watch a few things, if you are interested and need to know, msg me at CZ, I will share with you.