found this list here:
Class S
Porsche Carrera GT - $2,300,000
Class A
Alfa Romeo 8C Competizione - $1,900,000
Aston Martin DBS - $1,800,000
Aston Martin V12 Vantage - $1,600,000
Audi R8 Coupé 5.2 FSI Quattro - $1,700,000
Bentley Continental Supersports Convertible - $1,900,000
Bentley Continental Supersports Coupe - $2,000,000
BMW M1 Procar (1979) - $2,000,000
BMW M3 GTS - $1,800,000
BMW Z4 GT3 - $1,700,000
Chevrolet Corvette Z06 - $1,500,000
Chevrolet Corvette Z06 Carbon Limited Edition - $1,700,000
Chevrolet Corvette ZR1 - $1,800,000
Dodge Viper SRT10 ACR - $1,600,000
Ford Mustang Boss 302 (2012) - $1,900,000
Ford Mustang RTR-X - $2,200,000
Ford Shelby GT500 Super Snake - $1,800,000
Lamborghini Gallardo LP 550-2 Valentino Balboni - $1,700,000
Lamborghini Murciélago LP 640 - $1,700,000
Lamborghini Murciélago LP 650-4 Roadster - $1,800,000
Lamborghini Murciélago LP 670-4 SuperVeloce - $2,000,000
Lamborghini Reventón - $2,100,000
Lamborghini Sesto Elemento - $1,900,000
Lexus LFA - $2,000,000
Lotus Evora - $1,800,000
Koenigsegg CCX - $1,900,000
Marussia B2 - $1,900,000
McLaren MP4-12C - $2,000,000
Mercedes-Benz SLR McLaren 722 Edition - $1,700,000
Nissan GT-R SpecV (R35) - $1,700,000
Nissan Nismo R34GT-R Z-tune - $1,500,000
Pagani Zonda Cinque - $2,000,000
Pagani Zonda F - $1,900,000
Pagani Zonda F Roadster - $1,900,000
Porsche 911 Carrera S - $2,000,000
Porsche 911 GT2 - $1,700,000
Porsche 911 GT2 (997) - $1,800,000
Porsche 911 GT3 RS - $2,000,000
Porsche 911 GT3 RS 4.0 - $2,100,000
Porsche 959 - $1,800,000
Class B
Audi R8 4.2 FSI Quattro - $1,100,000
BMW 1 Series M Coupé - $1,300,000
BMW M3 E92 - $900,000
BMW M3 GTR E46 - $1,400,000
BMW M6 Convertible - $1,400,000
BMW M6 Coupé - $1,400,000
Chevrolet Camaro ZL1 - $1,000,000
Chevrolet Camaro ZL1 Year Two - $0
Dodge Challenger Concept - $1,100,000
Dodge Viper SRT10 - $1,100,000
Dodge Viper SRT10 Juggernaut - $950,000
Ford GT - $1,400,000
Ford Mustang Boss 302 '69 - $1,000,000
Ford Shelby Terlingua Mustang - $1,100,000
Jaguar XKR - $1,100,000
Koenigsegg CCX Elite - $1,900,000
Lamborghini Gallardo LP 560-4 - $1,400,000
Lamborghini Gallardo LP 560-4 Spyder - $1,400,000
Lotus Elise - $1,000,000
Lotus Europa S - $1,300,000
Need for Speed World BFH SUV - $1,100,000
Nissan GT-R (R35) - $1,300,000
Porsche Boxster Spyder - $1,300,000
Porsche Panamera Turbo - $1,400,000
Subaru Impreza WRX STi (Hatchback) - $1,100,000
Class C
Audi A1 Clubsport Quattro - $800,000
Audi Quattro 20V - $950,000
Audi S5 - $650,000
Audi TT RS Coupé - $750,000
BMW 3.0 CSL Gr. 5 - $900,000
BMW M3 Sport Evolution - $850,000
Cadillac CTS-V - $1,000,000
Chevrolet Camaro ZL1 Elite - $1,050,000
Chevrolet Corvette Stingray - $950,000
Chevrolet El Camino SS - $1,000,000
Ford Crown Victoria Police Interceptor - $850,000
Ford Escort RS Cosworth - $850,000
Ford Focus RS - $850,000
Ford GT40 Mk.I - $900,000
Jaguar E-Type Lightweight - $950,000
Lamborghini Countach 5000 Quattrovalvole - $900,000
Lamborghini Diablo SV - $1,000,000
Lamborghini Miura SV - $900,000
Lancia Delta HF Integrale Evoluzione - $850,000
Lotus Exige Cup 260 - $950,000
Mazda RX-7 RZ - $850,000
Mitsubishi Lancer Evolution X - $800,000
Nissan 370Z (Z34) - $700,000
Nissan Skyline GT-R (R32) - $700,000
Nissan Skyline GT-R V-Spec (R34) - $750,000
Renault Sport Megane R.S - $950,000
Plymouth® Hemi® Cuda - $650,000
Plymouth® Road Runner - $650,000
Pontiac Firebird Formula - $700,000
Porsche 911 Carrera RSR 3.0 - $900,000
Porsche 911 Turbo - $850,000
Shelby Cobra "Daytona" Coupe® - $950,000
Toyota Supra - $750,000
Class D
Audi RS4 - $600,000
BMW Z4 M Coupe - $500,000
Chevrolet Camaro SS - $500,000
Chevrolet Chevelle SS - $450,000
Chrysler® Hemi® 300C SRT8 - $600,000
Dodge Charger SRT8 Super Bee - $550,000
Dodge Charger SRT8 Super Bee Juggernaut - $250,000
Infiniti G35 - $350,000
Lexus IS F - $550,000
Lexus IS300 - $300,000
Lexus IS350 - $350,000
Mazda MX-5 - $300,000
Mazda RX-7 - $600,000
Mazda RX-8 - $600,000
Mazda RX-8 '09 - $600,000
Mitsubishi Eclipse - $550,000
Mitsubishi Lancer Evolution IX MR-Edition - $450,000
Mitsubishi Lancer Evolution VIII - $650,000
Nissan 350Z (Z33) - $600,000
Nissan 370Z Roadster Touring - $550,000
Nissan Fairlady 240ZG - $500,000
Nissan Skyline 2000GT-R (C10) - $500,000
Pontiac Solstice GXP - $500,000
Porsche Cayman S - $500,000
Renault Sport Clio V6 - $500,000
Scion tC - $550,000
Subaru Impreza WRX STi - $500,000
Toyota Corolla GT-S (AE86) - $300,000
Toyota MR2 - $500,000
Volkswagen Golf MK1 GTI - $500,000
Class E
Dodge Challenger R/T - $125,000
Dodge Charger R/T - $150,000
Mazda Mazdaspeed 3 - $200,000
Mitsubishi Eclipse GT - $150,000
Nissan 200SX (S14) - $200,000
Nissan 240SX (S13) - $200,000
Nissan Silvia (S15) - $175,000
Pontiac GTO '65 - $175,000
Volkswagen R32 - $225,000
Volkswagen Scirocco - $175,000
source:
this should all future IGC prices explain before the patch is added to the game.
AWayToExpensive