Gene,
The Crown Graphic is similar to the famous Press Speed Graphic, it does not have the focal plane shutter in the body, you use the leaf shutters on the lens. This makes the Crown lighter and narrower.
Go to
http://www.graflex.org/ for more than you want to know on Graflex cameras.
As far as cost I paid $195. from a local dealer for the Crown with the 162mm lens. This is considered equal to a 50mm in 35mm cameras. Mainly you will find them with a 135mm or 127mm lens as standard which is really a slightly wide lens.
I bought a Super Graphic for $350 that came with a 545 Polaroid back, an RH-10 roll film back (6x7 format), 2 Graphmatics, instructions, 200 sheets of out dated Plus-X and Tri-X film and I think 12 or so 4x5 double sides film holders, this camera's lens is a 135mm Optar. The Super Graphic has a revolving back so you can do portrait or horizontal wihout rotating camera body on the tripod. It is a metal body and has more front standard movements than any other press type camera.
I picked up a Graphic View II monorail in a package deal that included a graphmatic film holder, another 12 or so double sided film holders, a polaroid 500 back, (3) 3 cell flash guns , some hard cases, reducing backs for 3x4 and 35mm, flash cords, a 178mm Aero Ektar mounted on a graphic lens board, some extra lens boards, Kodak Ektar 100mm WF lens, Kodak Ektar 190 lens, A Wollensak 90mm lens, Plus a Baby Rolliflex TLR, Contax IIIA with 21mm Biogon, 35mm Nikkor f2.5, 50mm Sonnar f1.5, 135mm Zeiss
lens. Several boxes of neat cameras like Canon A1's, Beseler Topcon Super D, Olympus Pen FT, Etc., ETC.
Some times even a blind sow finds an acorn every once in a while.
As far a learning how to use one, there are very many ways you can make mistakes, about all of which I have done. This site is a good one to start you out
http://www.largeformatphotography.info/
Feel free to ask more questions, there is much I do not know but I will share my mistakes and hopefully some of my success.
Wayne