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" Leader blinked, they went into huddle. Shortly he turned and said, “We don’t have much. Will you do it for five Kong dollars apiece?” Six of them—“No. Ought not to ask a court to judge elimination at that price.” They huddled again. “Fifty dollars, Judge?” “Sixty. Ten each. And another ten from you, Tish,” I said to girl. She looked surprised, indignant. “Come, come!” I said. “Tanstaafl.” She blinked and reached into pouch. She had money; types like that always have. I collected seventy dollars, laid it on desk, and said to tourist, “Can match it? "
― Robert A. Heinlein , The Moon Is a Harsh Mistress