the cost of a new benq 7700 is around 3000 us dollars retail. If it is a display model, chances are, the lamp is aready in the hundred of hours used. Lamps looses some 30 % of their brightness after around 300 hours or so. If it is a demo unit, the lamp was probably used in its full mode not the economy mode that is posible at home(with a really darkened room)