GPA5 Laser 5mW ,$70

Projects a green laser beam/dot up to incredible 10,000 feet away with 5 mW green laser (532 nm wavelength) that is 30 times brighter than the red laser because human eyes are most sensitive to green light. It has a true 5 mW output power due to our proprietary feed back control technology. For astronomers, you can see the laser beam in dark sky and use it to point out constellations or collimate your telescope. It is the brightest pointer on the market. You can also see the green dot outdoors in the daytime. For lecturers, it draws the attention of your audience and makes your lectures more impressive.  It uses glass lenses and Sony laser diode. 

 http://www.betapointer.com/