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Bob's mom packed him a ham sandwich, chocolate pudding, a banana, and carrots for lunch. Bob really wanted potato chips with his lunch. Susan has potato chips that she hasn't eaten.
"Can I have your potato chips?" Bob asks.
"No, I was going to eat those later." She replies.
"I'll trade you my chocolate pudding for them." Bob says.
"Okay, deal." Susan replies.
What was the scarcity? Was barter used? If so, what was traded? Was there haggling?
The scarcity was Bob didn't have potato chips but he wanted some.
Yes, barter was used. The chocolate pudding was traded for the potato chips.
No, haggling was not used.