Here's what's publicly avaiable for world class corps.
The Academy: $3,000
Blue Devils: $2,700
Blue Knights:
Blue Stars:
Bluecoats:
Boston Crusaders: $3,675
The Cadets: $3,715
Carolina Crown: $3,675
Cascades: $2,950
The Cavaliers: $2,750
Colts: $3,000
Crossmen: $2,900
Jersey Surf:
Madison Scouts: $3,075
Mandarins: $2,600
Oregon Crusaders: $3,000
Pacific Crest: $3,200
Phantom Regiment $3,200
Pioneer: $2,800
Santa Clara Vanguard: $2,250
Spirit of Atlanta:
Troopers: $2,775
Here's open class.
7th Regiment: $1,460
Blue Devils B:
Blue Devils C:
Blue Saints:
City Sound:
Coastal Surge: $1,550
Colt Cadets: $3,000*
Columbians:
Genesis: $2,375
Gold: $1,750
Impulse:
Legends: $3,000
Les Stentors:
Music City: $2,300
Racine Scouts:
Raiders: $1,750
Spartans:
Thunder:
Vanguard Cadets: $1,850
*The Colts website did not differentiate between the primary corps and the Cadets. Might not be accurate.
Note that these are base fees. Nearly every corps has an early payment and vet discount. Some corps also require you to pay for new uniform parts. These are just rough figures.
EDIT: Added public open class fees and SCVC.