The most expensive horse is the Fusaichi Pegasus.
The Fusaichi Pegasus breed of horse is the most expensive breed of horse and sells for a staggering 70 million dollars.
Other expensive horses are.
Shareef Dancer - 40 million dollars.
Totilas - 21 million dollars.
The Green Monkey - 16 million dollars.
Palloubet d'Halong - 15 million dollars.
Seattle Dancer - 13.1 million dollars.
Meydan City - 11.7 million dollars.
Those are all expensive horses and you would need to be very rich to throw that amount of money out on a horse that may only live 20 to 30 years at most.
I love horses myself but would never pay even 1 million dollars for a horse even if I could afford it.