Habits , fashion and taste - In demand price is not only the main factor as even habits , fashions         

and taste are important , for example torn jeans are having a high demand in India , people will prefer torn jeans rather than have the proper one 

Income - an avg person in the US is able and willing to buy more goods and services than an avg man in turkey or iran , why ? In USA the currency and the economy is stronger than turkey and iran thus the avg man in US will have more income that the average people in iran or turkey

Advertising — marketing messages are used to inform, remind and persuade customers to buy a firm’s products. Companies such as McDonald’s, Apple and Samsung spend hundreds of millions of dollars each year on their advertising budgets in an attempt to increase the demand for their products. In india people pay sportsmen and actors for ads which makes the people buy the product due to the advertising

Government policies — rules and regulations such as the imposition of taxes on tobacco and alcohol will affect the demand for certain products. Sales taxes cause prices to increase, thereby reducing the level of demand. By contrast, government subsidies for educational establishments and energy-effi cient car makers help to encourage more demand for education and environmentally friendly cars due to the relatively lower prices.

Substitutes and complements — substitutes are goods or services that can be used instead of each other, such as Coca-Cola or Pepsi and tea or coffee. If the price of one product falls, then it is likely the demand for its substitute will also fall. Complements are products that are jointly demanded, such as tennis balls and tennis racquets or cinema movies and popcorn. If the price of one product increases, then the demand for its complement is likely to fall.

These are enough to explain that making the prices low are not the only options for demand of the product , people may also prefer something else