Trump Aska Suprene court to enforce transgender military ban

[harm_less]

Supply and demand is just a basic market function. If a demand exists for product A then a supplier will rise to satisfy that demand. If that demand increases then that supplier, or another, will make more available as they will see a market opportunity in doing so. The market will also dictate the price that they are prepared to pay for product A and the upper and lower limits of that price will be set as a result. If a comparable product B enters the market it competes by way of price, versatility and other advantages over product A. As a result demand for product A may reduce and its supplier can then reduce price or otherwise make product A more attractive to customers. That situation is how supply and demand set limits on products' marketability.

Other factors come into play such as price elasticity, product differentiation and technological advances but if you're unable to grasp supply and demand such mechanisms are likely to be even more confusing to you.

Raising the price when something is in short supply is greed, pure & simple.

That comment just proves you have no understanding of the basic functions of the market or the potential contributing factors that lead to supply shortages. Often such factors put upward pressure on prices, for example insufficient manufacturing capacity which results in a failure to reach the economies of scale that could otherwise reduce price. 

Also slow moving stock that needs to return the cost of the warehouse space that it has occupied while waiting for a buyer. That is often the reason car franchisees charge so much for replacement parts, or increasingly adopt a 'just in time' supply model which relies on express overnight deliver of goods from a centralised warehousing facility (or airfreighted importation) both of which also add expense to the item supplied.