a good deal or not?

while looking for parts for a front end disc brake swap in a 69 dart swinger, my dad located a 74 A-Body at a local scrap yard (i cant remember the specific model right now) anyway we told him that we wanted the upper control arms and spindles but the guy refused unless we took the whole setup. upper/lower arms, spindles, calipers, master cylinder, booster etc... for $600, i thought that was outrageous since we'd be replacing the disc's and calipers and whatnot anyway. But what is a fair price for the parts needed?