This topic could cover several pages, but the simple answer is that not all painters do the same type of job. If you were to get your car painted you would find prices ranging from $99.00 to several thousands of dollars. House painting is quite similar. There are many different levels of quality and service available; however, it is very difficult to know exactly what you will be getting. Assuming that all of your estimates are from reputable licensed and insured contractors, the major difference in prices are often directly related to the amount of surface preparation your painter will perform before the paint is applied. Surface preparation, when done right, is very detailed and time-consuming work which can take as much as 75% of the time required for the entire job. Since much of the "prep" work gets covered up once the surface is painted, this is the area where many painters can and will cut corners. You only need to understand simple math to realize that when painters cut the amount of time spent on your job, they can offer you a lower price. If you are dealing with a painter which you know nothing about, make sure you get a detailed list (in writing) of what he is going to do for you rather than making your decision based on a price written on the back of a business card.