This is just my own opinion, but I don't think Berger was trying to sell or otherwise transfer classified information. What I do think he was doing was sanitizing the Clinton records of possible criminal behavior. And no, I don't have any evidence--not yet, at least.
I don't either, if you mean like to a foreign agent, and did not mean to imply it. Since Berger took the documents and admittedly "discarded" some, one must wonder what really happened. I was actually thinking more along the lines of being in Clinton's possession for safe keeping or something like that. There was also concerns raised by Republicans that some of the information may have been shared with the Kerry campaign in an effort to give them "inside information". All speculative, but all something that would be investigated, I'm sure.