Respectfully, that is grossly inaccurate. There is no agency markup. For us, all our villas are priced exactly the same. There is no markup. In fact, if you book through VRBO, it is now more expensive than booking through an agency. For comparison, here is what happens when you book a villa through VRBO and through a company like ours.

VRBO:
Pay the Villa XYZ rate plus booking fee
Receive electronic confirmation
Receive contact information of the owner
*Some owners are great throughout the process but once booked, communication typically slows down.
Cross your fingers and make sure it works out since you are taking a gamble.

Book through an agency:
Guidance to ensure the best fit villa for you and to ensure expectations are being met
Pay the Villa XYZ rate without booking Fee
Electronic confirmations plus villa folder with helpful maps, tips, things to do and fact sheets
Personally assigned concierge to assist with logistics, arrival, restaurants, island information, activities, chef, charters, transportation and spa services at the villa
Free airport pickup
In person villa orientation
Event planning services
Welcome provisioning that includes a starter kit
Free rental car delivery to the villa
24/7 assistance and hotline should a problem arise
A second on island concierge when you arrive to take care of any spur of the moment needs
Problem resolution center- if there is an issue at the villa, make a call and it will be taken care of so you can continue your vacation seemlessly
100% Fraud Protection without additional charge
Full advocacy for guests. You have the backing of a large company behind you to protect your interests.

So there is a significant value difference, but it is not as expected.
The one you thought that was "cheaper" is in fact, not cheaper and certainly does not come close to the value of what an agency can do.

Rob