What is the term for the act of asking for a lower price on a product during a transaction?

If a store has a "cash-only" policy, what does it mean?

Cash is the only form of payment accepted.

What is the term for a period when stores sell goods at lower prices than usual to attract customers?

What is the term for a small, decorative object that you buy as a reminder of a place you visited?

If you try on clothes before purchasing them, where are you likely to do this?

What do you call the practice of buying and selling goods and services over the internet?

Where can you go to find second-hand or used items at lower prices?

What do you call a small, rectangular piece of paper that gives you a discount when buying a specific product?