Fulllove360 via eBay offers this 6.5-Foot LED USB Endoscope Video Camera for $4.19 with free shipping. That's tied with our March mention and the lowest price we could find today by $2. It features six LEDs, 640x480 resolution, and 30 fps recording.
Note: It ships from Malaysia so allow up to six weeks for delivery.
There's a less expensive way, and then there's the way that works for you. The two may not be the same.