We can't forget:
Fog Lamps; Cheap semi-clear plastic resevoirs designed to glow slightly when power is applied to them. More importantly they hold large amounts of water and also contain over priced bulbs which expire at various rates of time.
Gas prices; Large numbers posted on large signs designed to depress the average motorist. These numbers often have little to do with actual value, but can be bet on to rise when vacations are planned, huricanes are expected, or the sun comes up.