Well, with lasers you pay for quality

Picking up a cheap one at DealExtreme (.com) is easy, but it might just break, be badly collimated or otherwise be lame. If you want a reliable thing, that's more than a toy, prepare to shell out more bucks. That said, for most applications (presentations, playing with the cat, or pointing stars out), the simple things do well enough provided you didn't hit a real lemon (which you can send back).