$7,000:

...a Marine sniper who saw action in Fallujah in 2004, returned to Iraq in July 2006 after growing bored with his civilian life selling swimming pools to California suburbanites.
He planned to re-enlist, but he got a more lucrative offer: $7,000 a month to haul supplies in convoys for Crescent Security Group. He figured he’d have an adventure, help the Iraqi people and build a nest egg to buy a house and marry his fiancée

Baker/Columbian
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He joined the U.S. Marine Corps in 2001, served two combat tours in Iraq as a scout and a sniper without injury, and fought in the 2004 assault on Fallujah.
Discharged from the Marine Corps in 2005 with the rank of corporal, the chiseled-jaw Munns returned home to Shasta County

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Enlisted Basic Pay Rates
January 1, 2008 Monthly Military Pay for Enlisted
4 Years of Service
E-7/corporal
$2047.80