I can buy a factory refurbished amp for my subwoofers for about half the price of a new one. Has anyone bought refurbished before? Not sure if I should stay away from it or not, they include a 1 year warranty. The new one has a 5 year warranty on passive components and 1 year on the rest. I guess I keep thinking that the refurbished ones are the junk that has been returned but I don't know.