To make you feel a little better I have been hit for 2K about 9 years ago from this very thing. Was indeed to good to be true. It stung and I've never replied to a western union only type of transaction since. I've been ripped off by paypal also. Buyer said he didn't receive item and got his money back. My ups tracking number had two lines written through it by the ups front counter girl so I kept entering the wrong number. Also it is impossible to get anyone from paypal on the phone.
I still use paypal but it is like rubbing salt in a wound every time. I feel your pain. This is an expensive lesson learned.
Sent from my Droid