Nikon ML-L3 Wireless Remote Control (Amazon link) for Nikon digital SLR cameras has decreased from $13.12 to $10.55. Even at $20 it’d be an absurdly good value, a no-brainer.

I use mine when I’m making interior home shots on a tripod. I set my D80 to bracket, and shoot 3 frames as fast as the shutter speeds will allow using my remote.
What’s the benefit? With the remote, I don’t touch the camera, which makes each frame an exact dupe of its sister frames, except for exposure. This gives me in Photoshop the ability to layer blown out/muddy shots into the final delivered shot. I use the clone tool to clone non-blown highlights from a darker layer to the lighter one.
They’re durable, tiny, and mine have never needed new batteries.