Having found some old coin, for example, the 19th century, hardly anyone will not think about how much it costs now. For each coin there is a current market price, and it is formed from the same parameters.
What affects the value of the coin
First, the metal it is made of. The most valuable will be gold coins, which will definitely cost more than their weight in terms of the price of a gram of gold. Silver and copper coins are less expensive, but can also be worth a fortune with other ingredients.
Secondly, the circulation and year of coinage will be important. If there were only 100,000 coins and they were made 200 years ago, then about 50-60% were probably lost, drowned or destroyed by time. So, presumably, there is value. Information on circulation is in the catalogs of numismatists, there you can find the price.
Thirdly, the current state of the coin will be very important. Of course, there are no very old coins in perfect condition, but those that were issued 70-100 years ago are still there. Mechanical damage immediately lowers the cost, as does cleaning for a better look.
The real value of the coins
If you find some kind of coin, do not think that it is insanely valuable, and you will become rich in an instant. The chances of encountering such a coin by chance are negligible. Their search should be done purposefully, and even know where to look. Coins of the USSR or copper coins of tsarist Russia can be a frequent find.
The most expensive modern coin may be the jubilee “10 rubles” with the inscription Chechen Republic. Its cost on the numismatist market reaches 10,000 rubles, and the average price of the remaining coins in the series does not exceed 200 rubles.
To be well versed in the value of coins, you need to be a numismatist, have your own at least a small collection and constantly replenish it. First, you need to choose how long you want to get coins, and then start researching auctions and ads on the Internet for sale. It so happens that the real value of a coin is higher, but it was sold cheaper. This suggests that the coin market is highly dependent on current demand.
