Different methods apply to apartments and other commercial properties.
As consumers, most people shop at retail stores and pay the price printed on the price tag. We really don't question it, because we are programmed to pay the amount of money listed on the price tag. When stores have sales on certain items, it is because the store did not sell all of these items for the listed price within a certain period of time. Therefore, the store must now lower the price to persuade people to buy the remaining sweaters. Market value is simply the price at which something will sell within a reasonable period of time.