Most expensive Magic cards

This section is just for fun, to satisfy our own curiosity. Which are the most valuable MTG cards that you can buy on Mage? We're just starting the community, but we're sure at some point soon we'll start seeing the Black Lotuses and Moxes of the world. One day even Post Malone will come along and buy some cards on Mage 😉 - if you don't know who Post Malone is, he is a rapper, and also the guy that paid £1.57m for The One Ring.