Production of any item will bring down the overall value for the consumer, and many people appreciate being able to afford it. They are looking at their immediate need, and they often are unconcerned about passing an item on to future generations. There are plenty of consumers to buy products produced in great quantities, but there are still those people who appreciate unique items no one else possesses. Cherishing items of value generally comes from those people looking for something different, and they often look for artisans and craftsmen to make them.
It takes time and knowledge to create a special piece for a customer, and the value of working on a project can be quite high. The consumer must pay for all the time spent to produce the item, and they are also covering the cost of the materials to make it. While it can be quite expensive, most items made by a craftsman will last at least a lifetime. Some of them can be handed down through several generations, and all of them may cherish the beauty of the piece.
There are good produced in quantity that have a long wear life, but items by artisans and craftsmen will generally last longer. Some companies produce goods meant only to last a few years so consumers will purchase more, but consumers paying less might not take good care of the goods they have bought.
The value of an item can go up or down over time, and it depends upon how rare it is, how much damage there is to it, and how much someone wants to pay for it. Mass produced items tend to take decades before they go up in value because it takes that long before they become rare. For those unique items made by artisans, the value can go up within a few years simply because they are rare. Those who own them generally take good care of them, so their value can continue to rise through several generations.