[Energizer]

Sony AS100
225$
http://www.ebay.com/itm/Sony-AS100-Splashproof-Action-Camera-with-WiFi-and-120-240p-HD-Recording-/231464645108?pt=LH_DefaultDomain_0&hash=item35e45e 31f4

Sony AS30
175$
http://www.ebay.com/itm/Sony-Action-Cam-HDR-AS30V-POV-GPS-WiFi-Video-Camcorder-Camera-hdras30v-pov-New-/231528582111?pt=LH_DefaultDomain_0&hash=item35e82d cbdf

GoPro Hero 3 Black
320$
http://www.ebay.com/itm/GoPro-HERO-3-Camcorder-Black-edition-Wifi-remote-not-included-4k-Video-/271796068495?pt=LH_DefaultDomain_0&hash=item3f484e e08f

GoPro Hero 4 Black
499$