Final answer:
Buyers offer more than the price ceiling to increase their chances of securing a product during a shortage, leading to fewer transactions and decreased social surplus.
Step-by-step explanation:
Buyers would be willing to offer sellers $10 per unit instead of the $6 price ceiling primarily because they want to increase their chances of buying a good that is in shortage. When price ceilings are imposed, the market price is kept below equilibrium, leading to excess demand (Qd) over supply (Qs), resulting in a shortage of the product. Offering more than the price ceiling is a means for buyers to secure the product amidst this shortage.
In such a scenario, transactions are limited by the quantity supplied, thereby reducing the number of transactions to Qs and causing a decrease in social surplus. Additionally, quality of goods may deteriorate due to the price ceiling as it lowers potential revenues for sellers.