What is the value of a mtherestadg 1780x coin?

The value of a "mtherestadg 1780x" coin is difficult to determine without more specific information, as it appears there may be a typographical error in the name. If you're referring to a specific coin from 1780, such as a Spanish colonial coin or another type, its value would depend on factors like its rarity, condition, and demand among collectors. Generally, coins from that era can range from a few dollars to several thousand, depending on these factors. It's best to consult a numismatic expert or a reputable coin dealer for an accurate appraisal.