Final answer:
The social influence technique being used here is the foot-in-the-door technique. This technique involves getting a person to agree to a small favor or purchase, and then later requesting a larger favor or purchase.
Step-by-step explanation:
The social influence technique being used here is the foot-in-the-door technique. This technique involves getting a person to agree to a small favor or purchase, and then later requesting a larger favor or purchase. In this situation, the salesperson first asks you to buy an inexpensive product, which you agree to. This creates a sense of consistency and makes you more likely to agree to buying a more expensive product later on.