if you want a creamsicle like shown here:
http://www.pangeareptile.com/pics.htm
be prepared to spend 400-500 bucks, i wrote Pangea about them and that is the price they quoted me, and apparently they are pretty uncommon, as well as there green fires.
at a show you will probably find a wide variety of harlequins and tigers of a reasonable price, as you get into colors such as red, yellow, orange, expect probably $100 each.
just keep in mind that the better the pattern and the better the color the more money you are going to have to pay, and when you get into pinstripes, or partial pinstripes, or really nice flamed harlequins, the price will continue to go up as well.
dont make a quick choice, browse around, and always buy on the last day of the show unless you are worried yours may sell, vendors are generally more easy going about price on the last day of the show because naturally they want to sell off as much as possible.
oh, make sure to ask the vendor a lot of questions, make sure he/she knows what they are doing, act like a new hobbyists with little knowledge about cresteds and see how willing they are too inform you, a good vendor will be willing to spend the time to help you out in order to help make the sale.