Finder's take on the sales rep's trade is as cynical as that portrayed in the movie Tin Men or in the David Mamet play Glengarry Glen Ross.

FORBES: Correction Appended

In Glengarry Glen Ross (ranked seventh) and Tin Men (number nine), David Mamet and Barry Levinson, respectively, discovered drama in the desperation and chicanery of salesmen on commission.

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The cost of such "social protection" is evident in Athens' National Park, where hundreds of wild cats and homeless men live under flowering shrubs, eating from battered tin trays.

FORBES: Athens At The Crossroads

At the intersection where authorities believe the men were killed, crews hauled away a mangled white truck that had been crushed like a tin can.

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Through a shaky camera in the damp and dark mines of eastern Congo, filmmaker Frank Poulsen introduces us to some of the young men (and even children) toiling at the first stage of Congo's lucrative business in tin, tantalum, tungsten and gold.

CNN: Your cell phone, Congo's misery