I have seen a bunch of threads, in various places, regarding valve train problems in the Hemis. Supposedly, the springs are prone to breaking, and the seats occasionally drop out of the heads. How widespread is this? I've got no intention of buying a car only to do valve train work immediately. If this is a legitimate concern, I would essentially have to make repairs right away to forestall the problem. I'm not exactly in love with that idea.
Like was previously mentioned when you go looking for problems on the internet you will find them. Working at the Dealer level for 25 years I can tell you that if that was a concern I would have warned you about it. I have owned hemis, I have sold thousands of hemis and I drive hemis everyday and I don't recall the last time I saw or heard of that particular issue. Best motor we have had on the road since the 70's IMHO.