Is Xingyuan Mibao Ancient Coin worth 500,000 yuan?

Hello, the coin you collected is an ordinary coin, named Xiao Pingqian, the seal script of Xining Yuanbao in the Northern Song Dynasty. Its price is about 0.50- 1 yuan. Maybe this price will disappoint you, but you can buy it in the collection market with this money. There will be certain price differences in different regions (only representing personal views, for reference only). What you have collected is indeed the Xining ingot of the Northern Song Dynasty. No matter the shape and writing of money, it is the characteristics of coins in the Northern Song Dynasty, which is inconsistent with the characteristics of coins in the Tang Dynasty. It's just that the text of the coin in your hand is a little vague (poor clarity, signs of adhesion between strokes), which has caused your misunderstanding. (Still keep my original judgment)