I don't know much of economy... I only took a crappy course on it while getting my engineering degree but if I recall correctly it is us who will determine what will happen with the prices. The balance between demand and offer sets the price. If after the gen5 is out everybody goes out there trying to get a cheap Gen3/4 their prices will go up not down. If on the other hand people see the new car and decide to wait until they can afford one the prices will drop a bit. In general though car are depreciating assets so I think it would be unrealistic for a dealership or private seller to think they can raise the price of their used car by a huge margin. In general people is not willing to pay more of what they have seen other are paying for. So my guess is that prices will keep declining the real question is how the gen5 will affect how fast they decline. Viper are know to depreciate very slowly so we'll see.