Did you check their Google Webmaster tools in the Search Queries report? That should show you what terms were driving traffic

Otherwise check Analytics for organic keyword traffic and have a look at landing urls, you may be able to piece something together

Excel?

Best if you give the urls but I would say its a "Good Thing TM" .

A rich page of content around a keyword topic with mulitple media types is the way im building my content now - even if it doesnt work for Search Engines, its nice for people (crazy, huh?)

Personally I like to have links open in the same tab, I will open them in a separate tab if I want them there.

But like Alan, Ive never heard of it being an issue one way or the other

" All I wanted to know is how a site would be valued when it comes to selling it."

There is no way to tell. You get what you can convince someone its worth. You can like that or not but it won't change it.