It used to be that the first person to get a domain name could sell it to a corporate entity that wanted it for their own name... I believe it was Coke that paid big bucks to a person that had gotten Coke.com as a domain name before Coke had any idea there was such a thing as the internet or domain names.
I believe a court quashed that little enterprise by saying that if the company had trademarked the name then the name belonged to them and the company that owned that trade mark could sue the person that usurped that name for a domain name. Companies still pay a royalty to the person that did so, just to save the cost of the law suit, but that royalty is a mere pittance compared to what some of the earlier payments were.
Companies do have to "Vigorously" defend their trademarks or they will lose it. If this web site is not the Kadee corporate site, they may have to take legal action to secure their rights to the name. Some companies have gone so far as to get domain names that are "similar" to their trademark name, misspellings, dashes or periods between multiple word trademarks, etc. Just to maintain their corporate identity against scum that get such names to disparage or damage the company, or even fans of the company or product that just want some association with the company out of love for it.
If companies do not defend the trademark they can lose it.
That's Jon DeKeles' endeavor, according to whois.com. If the prices are good, go for it. I've found Ridge Road Station to have the best published prices on couplers, so it'd be interesting to see how his compare. (Greg, care to check RRS's site to see?) I'd bet that Jon may match RRS's prices, too. Doesn't hurt to ask, and the shipping may be cheaper depending on where you live. I end up paying full price at Caboose, but I tend to buy them one at a time, based on the project I'm working on at the moment. I don't pay shipping, and I get the added benefit of being able to buy all sorts of other stuff, too! What a bargain!