TomTop offers this 600X 4.3" LCD 3.6MP Digital Video Microscope for $55.99 with free shipping. That's the lowest price we could find by $13. It features a resolution up to 1920x1080, eight LEDs, motion detection, 3.6-megapixel still camera, and a rechargeable lithium battery.

Note: This item ships from China and may take up to three weeks to arrive.