What kind of panoramic camera? A flat image plane camera? Small, medium, or large format? If medium format, 6x12, 6x17, or 6x24? Manufacturers include Linholf, Fuji, Fotoman, Horseman, Widepan, Wisner, Hasselblad Xpan, Art panorama. Art Panorama, Fuji, and Hasselbled are only available secondhand. Do you want a swing lens camera? The Noblex, Widelux, KST widescan, Horizon, and Widepan are available - Widelux is only available used. A completely rotating camera? Roundshot, Globoscope, or old Kodak circut cameras are your choice.
The flat plane cameras give images more of a "natural" look. Center filters are a neccessary evil. Maximum field of view is limited to about 100 degrees. Swing lens cameras give larger fields of view (140 degrees) and no center filter is required, but since there is no distortion because of a curved film plane, they tend to bend receeding lines and give an "unatural" appearance. Rotating cameras give 360 degree panos.
I would do a search for panoramic photography to see some of the work these cameras produce. Yahoo has a panoramic catagory in their photo sites. You can also look at the International Panoramic Photographer Association site.
As far as prices, the cheapest is the Horizon swing lens camera. Maybe about $600. The next jump will be the swing lens medium-format Widepan or 35mm Widelux or Noblex at about $1500. The flat film-plane Fotoman is next at about $2000 or more depending on the lens you put on it. After that the Noblex medium-format cameras and Roundshot cameras start coming in at $3000 and up. The Linholf and Horseman 6x12 and 6x17 cameras start around $4000 and don't forget the $400+ center filter.
Another way is a 6x12 or 6x17 back for a 4x5 or 5x7 view camera. Or simply crop a photograph to a panoramic format. Stiching is a simple method with digital cameras, but any moving elements in the image become a challenge. Some cameras like form Mamiya and Bronica come with 35mm panoramic adapters of backs. They can be a solution for the occasional panorama, but they don't make goor panoramic cameras - they simply crop the medium-format frame and they don't handle well for the job.
Naturally, if you could give a little more detail about what you want with a panoramic camera and what you expect from it, we might be able to help more. BTW, there are specific technical problems panoramic photography introduces. These cameras require a bit of effort on the photographer's part to get the most out of them. It is also not a cheap area of photography.