Tea is NOT expensive, and NOT too cheap, either.

The price of tea includes the cost of

tea leaves, 
labors, 
packages, 
profit of farmers, 
profit of businessmen,
and so on.

Most of these costs are stable, unless some unpredictable natural disasters happen.

The changeable costs are the profit of farmers and the profit of businessmen. As everyone knows, most farmers are disadvantaged. They are maybe not poor, but would not be rich usually. 

Farmers depend on nature deeply and completely. However, when the goddess of nature smiles to them, they would not get THAT much money. Big quantity causes the price down, and little quantity makes the price up. The profit of farmers are stable, even they want to make it more, businessmen would not "allow" it happened. 

Farmers are disadvantaged in Taiwan. It is shame.
  
The ONLY cost of tea which could changeable is the profit of businessmen. 

It means consumers AT LEAST have to pay the cost of tea leaves, labors, packages, and profit of farmers.

Yes,
the price of tea should not be TOO cheap.

and Yes,
it could be expensive, MORE expensive, and MUCH MORE expensive. 

Do not buy the cheapest tea.

Do not buy the most expensive tea, unless your money is too much.

How to make it?
Go get some knowledge and experience of tea, and DO NOT let books in bookstores teach you how to buy tea. They sucks. If you go buy tea yourself few times, you would figure out that each one give you one way to distinguish tea, and these ways are all different.

That is why we started wait a moment.

Make sure the profit of farmers, save your "too much" money, and make my money. :)