Re-using ball joints?

30K is getting up there. China parts can be done as early as the next day, but typically may "go" a year or say 10,000 miles, being loose most of the way. The early Moogs and TRWs could go 30,000, and only be a little loose yet. Then again mine are currently pushing 125,000 miles; but they've been loose for quite a "while",lol.
I have never seen a Chrysler or an aftermarket Chrysler-type BJ actually fall apart.And the lowers have a very generous wear allowance.
I have seen GM pick-up BJs fall apart and that gets expensive.