You can purchase the courses below with the following number of SEGA Bucks. You can earn SEGA money by racing and racking up mileage.

Rampart Road (Billy Hatcher) - $5000
Dark Arsenal (Sonic the Hedgehog) - $5500
Pinball Highway (Sonic the Hedgehog) - $6500
Sewer Scrapes (House of the Dead) - $7000
Lost Palace (Sonic the Hedgehog) - $7500
Sandy Drifts (Super Monkeyball) - $8000
Rokkaku Hill (Jet Set Radio Future) - $8500
Rocky-Coaster (Samba de Amigo) - $9000
Highway Zero (Jet Set Radio Future) - $9500
Deadly Route (House of the Dead) - $10000
Ocean Ruin (Sonic the Hedgehog) - $10500
Bingo Party (Sonic the Hedgehog) - $11000
Lava Lair (Billy Hatcher) - $11500
Monkey Target (Super Monkeyball) - $12000
Thunder Deck (Sonic the Hedgehog) - $12500