There are great number of factors that influence the value of a collectible coin. Some of those are inherent to the coin like age, condition, mintage limit and errors. Other factors are only market forces, which can be changed by mass psychology, economic factors and dozens other causes.
Numismatists have no control over large scale factors. But when considering a buying or sale, there are still many aspects that a dealer can and should look at.
Coin grade is the 1st and most obvious of those factors. Even before seeking out one …