There is such a hobby and science - numismatics. One of its directions is collecting coins collected by year of issue and mints that minted them. Coins are currently expensive for several reasons.
According to the most rough estimates, only in our country about 50 thousand people are engaged in numismatics. Coins were issued in limited quantities at all times. For example, the “Ruble of Constantine” of 1825, of which there are only 6 pieces in the world, costs about 550 thousand dollars. Of the more real coins, 2 kopecks of 1925 are expensive, coins of 1947 and 1958, all coins of 2003. Coins of 2003 (1, 2, 5 rubles) are currently given from 5 to 15 thousand rubles, and the lower the denomination, the higher their value. So, the reason for the high cost of coins is their rarity. Coins, issued in 2003, can be found no more than 3000 pieces, and in one hand there may be several copies, which significantly reduces the supply market. If we assume that one collector buys up most of the coins, then the price of those remaining on the market will rise sharply, if there are other reasons for the high cost of metallic money. For example, a 1993 10-ruble coin issued by the Leningrad Mint reaches a price of 30-35 thousand rubles. But the same coin can cost an order of magnitude cheaper. When evaluating a coin, the alloy from which it is made may be the deciding factor. Naturally, gold and silver coins have the highest value, and the market price of a coin is also influenced by its physical condition. There are two systems for assessing the physical condition of a coin. The first one assumes seven degrees of wear of the coin, the second one - a 70-point scale, according to which 70 points are assigned to a newly minted coin, and 1 point - to a coin "killed" by time or a coin after unprofessional cleaning. The details of the minting are usually difficult to discern on such a coin. The ideal coin in the language of collectors is called Proof. Such coins are polished to a shine, and all the smallest details of the design are clearly visible on them.
