Seeing as you have a Kamp-King, I assume that your interest is in the scout pattern. I just happen to be a lover of Camillus Knives, and mostly just collect scout knives.
A Camillus scout can definitely be found on auction for cheap. The Camillus 99, their stainless scout knife has some of the best ergonomics on a scout pattern. The spear blade is absolutely heaven to use. It's a great knife. I've found them on auction for $20.00 to $25.00 new, on a good day.
Same goes for the old Camillus 99 in carbon steel. I just grabbed this from auction last night for $35.00
Also remember that Camillus made a lot of knives for a lot of companies. Many of the Boy Scout knives were made by Camillus, as were many delrin scaled late model Ulster and Western branded knives. Camillus also made scouts for Remington and Kabar. All of these knives are pretty much based on 2 different Camillus knife patterns, sometimes with just a blade or a scale variation.
My favorite Camillus-made scout is the Remington R-4. It's basically a Camillus 99 with an added wood saw blade, and a sheepsfoot blade instead of an awl.
Good hunting. Be patient and you can find an excellent new Camillus scout knife on auction for less than the original purchase price. They are definitely worth double the price. Camillus had the scout down to a science once they developed the 5779 pattern used in the stainless 99.
Here are some websites with great Camillus info:
http://camillusknives.ru/2mainframe.htm
http://www.collectors-of-camillus.us/