I'd take that and run. The DC k-members were notorious for poor quality and other issues (as far as I know they were all made in one batch in the mid-70s). The one that I had my hands on had ovaled strut rod holes because they missed when they put the plates over the existing holes, so they just ground them out to match. That car had a shimmy that would not go away, which I warned the owner of (it was so bad I could see it in my rear view mirror when he was behind me after a show).
That doesn't mean there is an issue with yours, but you have pretty much been offered what I consider top dollar...