How much shall i sell my pony for?????

he is 14.2 and has done 2ft 9 crossry he has done it 2 times in his life and won both!! he also won the skl team show jumping and that was 3ft to 3ft 3. he can jump 4ft 6 but not a course! he is black brown and white . he will shoe box and clip fine . can some 1 help me!!!!!!!!!!!