Normally a household will not buy a second-hand scooter even if the price of scooter falls. How we get a downward sloping market demand curve for scooters?

Explanation

(i) We know that though an individual may not buy a second-hand scooter even if the price of scooter falls but there may be some individual that could not afford to buy even a second-hand scooter earlier and now with a fall in their price they can afford it now.
(ii) Therefore, the number of consumers of a second-hand scooter increases with a fall in their price leading to an increase in market demand at a lower price.
Thus the market demand curve for scooters will be a downward sloping.