What an idiot:
There's a reason hitmen charge over $10k. See, for a mere $500, you would agree to meet him, and record your meeting. Since he's obviously an idiot, he'll blabber on about wanting to have the girl killed, and you'll have plenty of material with which to blackmail him.
And even if you could get somebody to kill her for $500, how sloppy of a job is it going to be? No elegance, no poetic justice, no subtle calling card left at the scene with no other traceable information. Just a redneck covered in blood, who left everything from fingerprints to his DNA at the scene. Pff, such idiots make us real hitmen look bad are the reason I hate people.
(why yes, I've purposefully ignored how he was asking people to have his accuser killed ON FUCKING FACEBOOK!)