service@paypal.com, account-review@secureroot.com Sent us more money than the product so we could pay the "agent fees" to western union, Internet

Was contacted on buying a bike on craigslist.  They sent "the payment" of 1150 and was contacted by "paypal" of the payment even though the bike was only $800.  The email from paypal looked nothing like the other emails that I have received from them and paypal was requesting that I send the extra $300 to pay for the agent fees and to go through western union to do it.  RED FLAG! 

The "buyer" then kept contacting up requesting us to pay the agent fees and then began threatening reporting us to the FBI because we hadn't paid them yet.  We also received an email from the "FBI" requesting us to give the agent fee of $300 otherwise we would be arrested...Not a legitimate email from either the FBI or from paypal.

We have not paid this fee and have reported the incident to the police dept.  He has since threatened to come to our home and hurt us.  WOW.  Just because we didn't fall into your trap, maybe you should just get a legitimate job, huh?  Anyways, I saw someone else reported someone from "secureroot.com" claiming almost exactly the same thing, probably the same stupid scammers. 

Be aware, NEVER send money to someone buying a product from you!!