It is difficult to give an average cost for SLR cameras. They range from a couple of hundred dollars to over a thousand dollars, even from the same brand. Nikon is a popular brand for SLR cameras and an average price would be somewhere in between the two given figures.
Portability and cost.
It depends on your preference. Canon is much more popular in the SLR space than Nikon, but Nikon users swear by their lenses.
Slr cameras have great lens versatility, better performance than prosumer digicam and film cameras, and better shooting flexibility. They also have virtually no per shot cost as opposed to film cameras.
Most digital SLR cameras can run you around $800.00 new. They certainly can vary in price depending on the brand of camera. Here is a link that can provide you more detail in what you are looking for. http://www.nikonusa.com/Nikon-Products/Product-Archive/Digital-SLR-Cameras/25412/D80.html
The Pentax Optio are a range of compact and D-SLR cameras. They range in price, depending on specifications from å£120 upwards. The D-SLR models are more expensive.
SLR digital cameras are professional grade cameras which have settings which may be manipulated to produce outstanding photos that otherwise could not be achieved with a regular digital camera
SLR cameras rang from 500 dollars to over 1100 dollars. Some bonus features on them are a silent focus, a internal zoom. Also must of these cameras all contain the same bonus features. So whatever you pick it will have the same features.
All major camera companies make SLR cameras, as well as digital SLR cameras. My photography teacher always recommended the Promaster 2500PK Manual SLR camera for its ease of use, value, and manual functions.
Yes, it is legal
You can go to Best Buy's GEEK squad and have them assist you with slr cameras. Another option is to go to Amazon.com or Wiki to research your preferences.
Digital SLR cameras tend to be the higher priced digital cameras. During some searches, I found prices for digital SLR ranging from $598 to $1,200. If you have a particular brand in mind, check with the manufacturer to see if they have refurbished units available. Refurbished unit have full warranty but usually are cheaper.
One can purchase lenses for SLR cameras through online retailers such as Amazon or eBay. Alternatively, one could purchase SLR camera lenses at a physical store such as Best Buy.