Jeff wrote me with the following question: I have a catchy name for a product that already exists, but as far as I can tell no one is using this name. If I trademark the name, can I sell the trademark to a company, similar to a web domain?
Jeff, the over simple answer is yes you can try to sell your trademark. However, it's not like cybersquatting. Trademarks are sold as part of the sale of a business. You can't trademark register a name unless you are using it in commerce (or bona fide intent to use) and not just the commerce (business) of selling the name. BTW There are now laws on the books that can deter the business of cybersquatting.
Trademark creation services do exist - people that make up a great name or logo for a business and then that business owner registers the trademark - for example this one that I found randomly. Don't know if that would work for a one off.
Famous Trademark Sales
The name Coca-Cola is a combination of the names of two ingredients, the coca leaf (from South America) and the kola nut (from Africa). Between 1887 and 1888, the name and formula were sold three times.
Image Courtesy Coca Cola Company