I went to the famous Dr. Pelcman last year and I paid USD1000. I wanted a sure bet and I got it. My bone didn't leave any room to chance since I was dealing with a bad crown made 20 years ago. The dental clinic part of my hospital network charged less than half, but I got a bad vibe from the place.
Of course the fraud is when you are told a lie. I had an implant done in BA about fifteen years ago (imported materials -- I beleve that to be true) and it's just fine. I've been advised by dentists that European materials are better but maybe they've improved the nartional product. That's also true of eye glasses. Lenses from France and Germany are much better than Chinese imports.