Just for some comparison, I had all 4 ball joints replaced, had an alignment done and had all 4 axle seals replaced by the local Ford dealer about 2 years ago. Total cost was $1000. If you can't do the job, I'd say $600 isn't to bad. Just my opinion.
no, it really isn't..
Without looking it up, I'd say you're looking close to $500 (joints & seals) just in parts..