Before buying a camera, consider making one. Making cameras is part of the pinhole spirit. There are lots of websites with instructions and help in making a camera. Cameras can be made from the simpliest of everyday materials, costing you little or no money. And a home-made camera can make every bit as good a pinhole photograph as one you buy.
But, there are also good reasons for buying a camera. Some people are not comfortable making a camera, and some people like the quailty of a well-crafted camera. For those who prefer to buy a camera, I recommend the sources listed below.