Shop4Tech.com offers this 8-LED Illuminated 1.3-Megapixel USB Digital Microscope for $54.95. (A free breathalyzer keychain is automatically added to your cart when you purchase this item.) Coupon code "PC18" cuts it to $45.06. With free shipping, that's $4 below our July mention and the lowest total price we've seen. It features 200x zoom, 1280x1024 maximum resolution, manual focus, snapshot button, and more. Deal ends September 30.