Jolteon

When you die, I’m going to laminate your skeleton and pose you in the lobby. That way future generations can learn from you how not to have your unfortunate bone structure.

Based on the Wikipedia article, it’s $6,490,000/kg.

Assuming you can legally purchase that amount (which you can’t), you could even find that much for sale (would you probably couldn’t), and the price didn’t go up as you purchased more of a very scarce resource (which it would), it would be about $6.5 billion US.

Semi-Relevant XKCD

Firefox, which has most of the desktop extensions also working on mobile.