Do you have the serial number of the camera recorded from when you originally bought it (or sold it) ?

It probably wouldn't help in the short term, but if it is put up for sale in the future, it may be possible for the police to track it's history and identify either whoever stole it en-route or comitted a subsequent fraud.

A terrible position for you to be in with a major sale. Good luck in the long term.

Kind Regards,  Kevin