Many good manufacturers refurbish units either part exchanged or returned under warranty. In many cases these units are to an `as new` standard when offered for re-sale but because they are `second user` units seldom attract a price close to that of a truly `new` unit.
Businesses such as Morgan Computers click here carry such units along with surplus/discontinued stock and these are a bargain for those on a tight budget.
I agree with you, jakimo, it is a great way of picking up a bargain. However, if everyone did it we would all be chasing a very limited supply.