Petrushka, whose retirement from racing was announced June 14, has been sold to Darley Stud by Highclere Thoroughbred Racing for an amount said to be in excess of $5 million. The exact price was not disclosed.The price paid for 4-year-old Petrushka (Unfuwain -- Ballet Shoes, by Ela-Mana-Mou), last year's champion three-year-old filly in England, is higher than the record for a broodmare prospect or filly in training sold at public auction. The highest auction price is $4.6 million, achieved twice, by Myhrr in 2000 and Open Mind in 1989, both at Keeneland's November sale.The highest public auction price for a broodmare sold in foal is $7 million for both Korveya and Miss Oceana."Darley is absolutely delighted to own a filly of this exceptional caliber," John Ferguson said. "It is very unusual for a filly to become available who has such a superb race record, pedigree and charisma -- she is a queen.""From the moment that John Warren bought her, she always looked a very special filly and we will recall her career with the fondest memories." Harry Herbert, managing director of Highclere, said. "Her win in the Kildangan Stud Irish Oaks (Ire-I) was perhaps the highlight for me as she became the first syndicate-owned Classic winner."Petrushka suffered a strain to her right fore tendon while running in the group I Vodafone Coronation Cup (Ire-I) at Epsom on June 8. She won her only race at two and last year at three won three consecutive group I victories: the Kildangan Stud Irish Oaks at the Curragh, the Aston Upthorpe Yorkshire Oaks at York and the Prix de l'Opera at Longchamp. Petrushka was bought as a yearling for IR110,000 guineas. She was trained by Michael Stoute.