Some products are offered at really wide range of prices and generally it can be told that customers can really take advantage of this fact. In such situation it is more possible to afford a particular product that someone needs, because there will be a less expensive model which almost everyone can afford and at the same time there are more sophisticated models which are definitely more expensive and therefore fewer people can afford them. Obviously models which are more expensive offer better qualities and often are characterized with some special features which are designed for people with some special needs and these cheaper models are designed for average users who have only basic needs. Such situation can be observed on the market of oil heaters. There are some heaters which are really cheap and everyone who wants to increase temperature at his place can afford them, but at the same time some models of these heaters are really expensive, but these models are designed to adjust temperature in much bigger places and this is the reason why they are so expensive. There are many people who want to buy oil heaters and they have to precisely define their needs before they decide to buy one.