NEW Mini DV DVR Sports Video Camera MD80 Spy cam 30fps - eBay (item 280475845144 end time Jun-07-10 02:29:54 PDT)
Small clip on video/audio recorder. You need to also buy a micro SD memory card (under 10.00) so for under 30.00 you can clip this camera to your shirt or tool bag or where ever and not worry about crazy people making you day worse then it needs to be.
My state allows one party consent, meaning if you consent to record your environment it is legal. Check your state laws.