Snooping on others is usually frowned upon, unless you're a precocious child detective, or the author of a behind-the-scenes expose about how to make KFC at home. Secure your secrets with this Groupon.

$25 for $50 Worth of Surveillance Equipment and Accessories

The distributor supplies customers with surveillance gear and accessories such as a wireless black and white camera hidden inside a reading lamp ($299.25), a high-gain microphone ($39.95), and a cigarette-lighter power adapter ($16.50). See the full catalog.