What determines the value of an item?

the amount of goods that are produced

the capital required to build the factory

the unlimited wants of the consumers

the resources consumed in production

I believe the answer is: the resources consumed in production

The 'resources' that mentioned above includes time, price of the materials, expertise of the labor, rarity, etc.

If the items that made possess more of these characteristics, the more valuable that item would become in the market.

Example:

Item that made with a lot of resources: House

Item that made with very little resources: Toothpick