I hear o-like have underspec Chinese lasers. I wouldnt buy from them. I would suggest dragonlasers.com or wickedlasers. or dinodirect has a good 100mw -150 pretty cheap. Under 100.
http://www.dinodirect.com/200mW-UltraFire-WF-501B-Flashlight-Style-Green-Laser-Pointer.html...