A neighbor was robbed recently, and the perps (sorry, suspected perps) were casing other homes in the area for a while. Prompted me to buy an alarm system on ebay, some video cameras, and driveway alarm. The driveway alarm can be bought from Radio Shack probably just as cheap as can be bought from Northern Hydraulic. When this goes off, I check the camera to see who's coming. It senses IR emissions from the front of the car and sure enough, a VW doesn't always set it off especially on a cold day. Open it up and tape over the LED next to the IR sensor. If you don't, anyone coming down the road at night tripping the sensor will see the sensor port light up. If I didn't rent, I'd bury a sensor in the road. I live midway down a dead end road in the country, working from my garage also. Only one house past me, so I scrutinize every car coming down the road.
Bought CCTV cameras on ebay to use with older color TV. Couldn't get any picture but both sellers swore cameras worked. Found an RF Modulator (radio shack) at a yard sale for a buck and tried it on a lark. That was the ticket. Suggest auto-iris and wide angle lens. Looked into recording. Special VCR's are not cheap. If a smart thief thinks you're recording surveillance video, he'll try to find the VCR and take the tape. Suggest no overt recording from main camera. But, try to hide a small camera where you think you'd be able to get a license plate, and wire this to a hidden setup.
If you look at an alarm and monitoring service, shop around! You can install your own system for a fraction of a commercial install and hook up with an independent monitoring service. Ademco is one of the largest outfits and there's a lot of Ademco stuff on ebay. They also have a good web site with lots of PDF specs on systems and alarms. The neighbor that got hit had an alarm installed and 2 weeks later I got a call from the monitoring service that there was movement in the house. Hot damn! Grabbed the .45 and headed up, hoping to nail some dirt bag. Turned out the dog tripped an IR sensor improperly calibrated.
I'm hopeful that in the not too distant future, GPS tracking will become small and cheap enough one could tag at least some stuff. If stolen, that'd give you a shot at tracking down the perps in time to recover everything.
As for thiefs with balls, used to work in East Palo Alto in sheet metal shop late 70's. Buddy went up to a corner store to get something for lunch. Came out minutes later to find his truck door open and two fellows standing there with his stereo and speakers asking "Wanna buy a stereo cheap, looks like it'll bolt right in?" East Palo Alto then wasn't the sort of neighborhood where a lone white guy would want to start something, so he choked down his anger and drove away...
Jon