Bonhams is legit (hah! like I'd be a customer of theirs), but post-Rudy Kurniawan you have to wonder about the possibility of fakes. It would be interesting to know if any of these are from winery libraries.
K&L until recently had Heredia going back to the the late 1940s.
I'm really starting to like aged Rioja because I've been finding some good bottles in my price range, If I was a zillionaire I could see myself buying these.