"Sale"

Why is there a sale ongoing annually. Is there a need for it once every year [is up]?  Does one really earn any money from (the outpourings from) a sale. What are the things sold (to be qualified) in a sale? Outcasted, cheap thrills that it would still find an expected owner anywhere? Then why don't there be a sale everydayas and when. Why only sale in a sale period? Why don't every day be lived as a sale and every sale as a non-sale, until the enumeration might cancel off each other and there will be no more sale or non-sale-companies losing their latch on the sale? 


How about the sale in one's life. What are the things one should go on a "sale"? And why some things on sale, while others not (need). If it is all-sale is it equivalent to no sale and actually days= sale {days} until there is no such thing as a sale or no-sale and one might as well lose one's latch on the sale.