cost for replacements question not answered
ball joints on 2002 Lincoln LS
I think the front suspension ball joint is part of the steering knuckle, part from Ford is $220 to $350 depending on production date, a little over 2.5 hours per side to replace and align.
1 more answer
Depends on your shops in your area and the quality of parts used. Go to the estimator link on repairpal homepage and see what it says for your area.