When I used to live up in MD if any firearms were stolen the police would take down the serial numbers and every month a list of the numbers went out to all the pawn shops to check their inventory lists. Many weapons were recovered this way including my best friends 30-30. With any luck theirs a similar system down here. Just make sure the police have all the serial numbers. Good luck with the recovery.
The local Pawn shops send a list to the local PD. The PD will ask them to be on the look out for certain items also.