In case you did not find your answer yet Jack, vrbo.com is a web acronym for "Vacation Rental By Owner". It would be wrong to assume they are an "outfit" with whatever connotations that carries along with it. They are, in fact, a very good organization, helping those who have properties in vacation areas market their properties independently, economically and honestly. They are, in reality, a web hosting site, not a marketer. I have many friends who utilize the site to book their properties and have 1st hand knowledge they are a highly respectable organization.
Just want to set the record straight also that when one comes across a property they do not get the wrong idea.