The wild card entry Summer Sands was third in the G1 Middle Park Stakes and was the highlight of the second day. The son of Coach House won the Listed Redcar 2YO Trophy on his latest start.
Bill Dwan secured the two-year-old for record for a colt at this sale and the third highest price in the sale's history.
He was purchased by Dwan on behalf of trainer Joseph O'Brien.
"He is a gorgeous horse, scopey, and I think he has some more improvement to come next year," said Dwan.
"He'll get to Ireland and have a break. He has been very well campaigned by Richard Fahey."
Former owner Chris Swan of The Cool Silk Partnership said: "It is bitter-sweet as I think he will go on to be a brilliant horse as a three-year-old, but we buy two-year-olds and sell at the end of the year. It is the best sale result we have had in the auction ring."
Bloodstock agent Matt Coleman bought the colt as a two-year-old at the spring's Tattersalls Ireland Ascot Breeze-Up Sale.
Bill Dwan also secured the lightly raced three-year-old Dance Jupiter for 270,000 guineas.
Consigned from trainer John Kiely's Lisfennel Stables in Ireland, the son of Kingsbarns won on his second career start at Cork at the start of October and has a Timeform rating of 88p.
"He has been purchased for Chantal Regalado-Gonzalez," said Dwan. "This horse will go back to Ireland to Joseph O'Brien."
The Oasis Dream colt Incinerator is headed to Saudi Arabia after being purchased by Abdulaziz Al-Mousa for 200,000 guineas.
Offered in the Castlebridge Consignment on behalf of Hugo Palmer's Kremlin Cottage Stables, Incinerator raced in the colours of his breeder Ibrahim Araci and the two-time winner has an official BHA rating of 83.Abdulaziz Al-Mousa said he would be set for a supporting race on the inaugural Saudi Cup card at King Abdulaziz Racetrack in February