An article on Domain Name Wire(link below) describes how buying a domain name resembles a lot like buying a Hyundai car, and how cars and domain name sales dealers have the same question of "what do you want your payments to be".
the article even states that domain owners are squatters that are ready and just holding out to flee with the right price a person can generate who wants that very domain name.
The full article is much more interesting.
Link: Domain Name Wire » News » Stop Selling Domains Like