While you probably wouldn't have gotten your actual property back anyways, you could have at least gotten a restitution order out of a criminal prosecution, so I understand your frustration.
But you still have the option of filing civil lawsuits against these guys. Civil judgments aren't as easy to enforce as restitution orders, but it seems like it would at least be worth a try, especially if this could be a small claims case. The burden of proving that these were the guys that stole your items is far less in a civil case, and there's a good chance that you could wind up with a default judgment.
Best regards!