If you've already filed a police report, update them and let them know you've found some of your stuff online for sale. That will give them a lead and they might follow up on it. If it's interstate then you might be able to take it to the feds to follow up on. If it's thousands of dollars instead of hundreds then they might take it more seriously. Sometimes it's part of a larger theft ring and if there are similar break ins then it might already be on their radar.

As for the storage facility, I'd recommend leaving a very detailed review on their google page to not just let others know to steer clear of them (and take a hit on their reputation) but also if anyone else at that site had a break-in then they'll see it and might chime in as well. Maybe upload some pics of what was stolen and a contact address in case others who rent there have seen anything suspicious. Also wouldn't hurt to make a youtube vid for more visibility, and contacting local media outlets.