Sorry man, it's happened to me before, and it fuc*ing *****. Since you don't have insurance, all hope lies on the police. These are some steps you can take:
Was it stolen at a parking lot on campus or of a business of some sort? If so, contact the necessary people to see if there is a camera monitoring the lot. If it was a public parking lot, you're probably **** out of luck. But if it's a business or establishment of some form, and they dont have cameras or parking lot security, you could file a complaint or possibly sue for negligence or something, a lawyer would be able to give you better advice in that area. If you have the serial numbers, you could give them to local pawn shops or other shops that will give refunds without receipts. Also, check the classifieds and garage sales and whatnot. You could also email eBay and describe what happened, and they can inform you if any items similar to yours are placed up for auction. You probably won't have any luck in that area, but it's worth a shot.
Also, talk to the other people whose cars got robbed, and see what was stolen and talk to the police with them. Whoever stole your **** clearly broke into all the other cars too, so if the police are able to find an item from another persons car, that means they have the person that stole your stuff as well. That's probably your best hope. Whoever broke into all the cars wasn't after one specific thing, meaning they didn't hear your system and target you, they just happened to get very, very lucky. So that means they are most likely trying to find as many items as possible for resale value, and with so many cars broken into, there's a greater chance of them getting caught.
Good luck man, I know the feeling. I didn't have insurance when my system got stolen, and I wasn't able to get any of the items back. If you do get the stuff back, or if you're forced to get all new equipment, definitely get insurance. It ***** having to learn the hard way.
"The world is full of people who want nothing short of perfect,
but settle for less, blinded by their quest for purpose."