TG, i thought about this....fuck her dude....here is what you do:
steal some pics of a buddy, make a new profile with a new email. Make yourself seem like the same guy....well off, married, etc. send her a few messages and see if she bites.
when she goes for a meeting handcuff her ass to the steering wheel or something in your car and drive her to the police station. this shit she is doing is not legal (or shouldn't be)....if she agrees to give you back the 5k before you get to the police then let her go....but if you don't get one cent and manage to scare the shit out of her, you are helping out hundreds of future victims