Actually, mercury amalgam removal is generally around $2,000 to $3000 and that is if you have sedation and quite a bit of work to do.
If you have mercury and root canals in your mouth, no matter what flush you do or what natural treatment you do, you will get sick again (if you feel better in the first place). I spent 33 years trying to feel better and nearly 20 of that pursuing health remedies. Many times I would feel better for about 3 months. I was told by an authority that "the mercury always wins".