Aston Martin cars are sold in thousands upon thousands every year for obvious reasons. More importantly, when a car is built and sold for $250,000 or more, very few people can afford one. Furthermore, beautiful and powerful touring cars like the DB11 are out of reach for most car buyers. Someone with three children in the villages needing to pick up the kids and practice football equipment will not be helped by the DB11. As a result, Aston builds fewer cars compared to the smaller manufacturers of the traditional model.
With lower production numbers comes higher prices. This all stems from a basic economic concept called economies of scale. The point is that when the quantity of goods increases, prices fall. Profits for the manufacturer come from buying more of the materials used to make the car. In this way, the parts supplier can manufacture the part, including the cost of development and any necessary tools, such as molds, in the cost of each part.
As the number of units produced increases, the fixed cost is spread among more units, thus reducing unit costs. Therefore, a part such as the lamp assembly, which is difficult to produce, is much cheaper to produce when the costs are spread among 200,000 units of Toyota than 1,000 of Aston Martin. This is why the DB11 costs more to buy and why replacement headlights, for example, are more expensive than one for a Camry.