A 1538 8 Reales is far and away the most valuable Mexican coin ever recorded, having sold at auction in 2016 for $528,000. But it’s not the only one that can command an extremely high price.

Time to check your pockets and piggy banks for the 20 peso coin that people are offering 5 million for. Its design is so special that it's worth that whopping amount. The 20 Mexican peso coin is ...