To find an inexpensive micro camera, check out your local Target or Wal-Mart. They both carry model that are under twenty dollars and they even offer a line of them that are safe for kids.
Camera shops will sell them.
You can get them from supermarkets, or camera stores, or phone stores sometimes, usually micro SD there though.
Some potential uses for a micro camera are spying, theft protection and security. A micro camera can be concealed and difficult to find on normal occasions.
Just go to best buy. I promise that they have a digital camera between those prices.
The most inexpensive offering at Trend Micro is their Titanium Antivirus Service. It is currently on sale for 50% off the original price. Because it is the most inexpensive offering, it also provides the lowest amount of protection.
You can buy inexpensive fake gauges at eBay.com online.
One inexpensive color security camera is the Night Owl CAM-CM01-245A CCTV camera. Another inexpensive color security camera is the Lorex CVC6945 high-resolution night vision camera.
Photography where the camera is attached to a microscope.
Unless the camera comes with software that interfaces w/ Mac through its supplied cable (USB or otherwise), the easiest way is to buy an inexpensive card reader. Alternatively you can buy a printer with a card slot that interfaces with the computer through the printer's software.
The major difference you might find between an expensive and inexpensive wireless web camera might be the picture quality or sound quality since they will need to use lower grade equipment.
Wal~mart
There are several places that you can buy a micro pig in and around Cornwall. One place is Pennywell Farm.