Bicycles. Yeah, totally grab one at a garage sale. They are way more efficient than walking or running. Being simpler, they are more reliable than most other vehicles. They don't take up much space in storage. But not only is a bicycle a target for thieves, you are particularly vulnerable on one. Both your hands and both your feet are busy. Speed (escape) is your only advantage. If that doesn't work you have to stop and confront. Then you are probably losing the bicycle, yourself or both.