An estate sale is a type of garage sale, yar sale or auction to dispose of the majority of the materials owned by a person who is deceased or will be moving. Estate sales are usually conducted by a professional, for a percentage of the revenues. This is because the scope of the process is usually overwhelming to the survivors, and for the specialist's experience with pricing antique items, his or her following of customers, and the specialist's experience in disposing of unsold goods in an unsentimental manner after the run of the sale. Antique and collectible dealers use estate sales as one of their more important wholesale sources. Estate sales are typically 1 to 3 days long, often with a price reduction toward the end.