My boss has a great policy when it comes to "camp" guns or "rentals", whatever you want to call them. He set's aside funds every year to purchase client rifles of appropriate caliber and quality optics. After a couple of years he offers them up for sale to the guides and foresters, keeping his armory full of relatively new firearms. With resale money added to the state money every two or three years the new guns are continually being upgraded. That keeps higher end guns in our clients hands and makes them more attractive as resales to us as well.