As with anything it depends upon their type, quality and condition. A used, unpopular model of a professional film camera in barely-operating condition can easily be found at a very low cost on sites such as ebay. On the other hand, a new Hasselblad H4D-60 will cost you about $42,000.
Probably the most expensive "camera" in the world will be the James Webb Space Telescope. This is essentially a special purpose professional camera with a huge telephoto lens in orbit around the earth; the estimated total cost is $8 Billion.
http://reviews.cnet.com/best-professional-dslr-cameras/ has many reviews for professional cameras. You can research them and pick the one that you think will fit your needs the best.
They are Professional grade cameras.
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
The professional cameras are such as Logitech HD Pro Webcam C920, 1080p Widescreen Video Calling and Recording cameras among others.
You can buy movie cameras for retail at online stores specifically, B&H photo, OneQuality.com, Camera.pronto.com. I was unable to locate any physical stores to go to purchase professional movie cameras.
Both SLR and DSLR cameras are suitable for professional photography, but DSLR cameras generally offer more advanced features and better image quality due to their digital technology.
A professional video camera creates electronic moving images. A regular movie camera records images on film. Most professional cameras are larger and heavier than the regular movie cameras.
Many online users review professional Canon cameras. These reviews can be found on various websites like Reviews and Cameralabs. Both websites offer a great variety of reviews for all kinds of Canon cameras.
You can purchase professional Canon cameras from all good electronics stores, such as Currys. Alternatively, you could try webpage stores such as Amazon or Ebay.
The standard camera tripod screw size used for most professional cameras is 1/4 inch.
Canon cameras are typically categorized into three main tiers: entry-level, mid-range, and professional. Entry-level cameras are designed for beginners and offer basic features and controls. Mid-range cameras offer more advanced features and better image quality. Professional cameras are top-of-the-line models with the most advanced features and specifications, catering to professional photographers and enthusiasts.
Professional cameras cost much more than that. I would not buy a used camera, too many thing to go wrong.