If it's just a filling and not a crown, that quote seems kind of high. If they're using ceramic instead of regular composite, maybe that's why.
I am amalgam-free but did not have the removal done safely. Aside from the peripheral poisoning, I swallowed a huge chunk of mercury. Add that to the fact that I was eating sushi like a Piven, I screwed myself up royally and am still paying for it, 10 years later.