Ok, so this is my entry into the hack It Challenge. Here, we're going to use two separate lights to make one awesome headlamp!. Let me first stipulate that $3 depends on you materials cost, it may be higher or lower, but either way you get a decent lamp out of it.
Disclaimer: A soldering iron is used in this instructable, barely, but its a good idea to know what you're doing with one.
Step 1: Materials and tools
First, source your parts. I got a 9 LED flashlight for a dollar as well as an incandesant headlamp for two dollars from HF.
Short length of wire
small phillips head screwdriver
pair of pliers/vicegrips