David Henderson poses for a photo with Zara Phillips at the Magic Millions Sales Complex on the Gold Coast on Wednesday. Phillips is the ambassador for the 2013 Magic Millions carnival.

David Henderson poses for a photo with Zara Phillips at the Magic Millions Sales Complex on the Gold Coast on Wednesday. Phillips is the ambassador for the 2013 Magic Millions carnival. Photo: Getty Images

DAVID Henderson believes he has once again picked up the best filly from the Magic Millions after he was part of a syndicate that paid $500,000 for a Fastnet Rock filly on the opening day of the Gold Coast sale on Wednesday.

''We have had a bit of luck buying fillies, which are the best physical type at this sale, and that's why we bought this filly,'' Henderson said.

''We got Urban Groove and Sugar Rush doing the same thing and it is a similar group of us in this filly.''

The filly is a sister to Legally Bay and was knocked down to bloodstock agent James Harron, who confirmed it had sold to a group of Gai Waterhouse's clients. The filly's ownership includes Nick Vass and John and Anne McDonnell.

The Waterhouse stable, including her major syndicator Star Thoroughbreds, spent $3.5 million on the first day. Waterhouse also purchased the top-priced colt, a Fastnet Rock-Liberty Rose offering from Coolmore, for $500,000. The stud kept a share in the colt.

''Gai Waterhouse is always [the] guts of our sale,'' Magic Millions managing director Vin Cox said. ''She works very hard at getting clients and promoting racing and it is always pleasing to see her buying strongly.''