Hi Nick,
first of all, thanx for your responses.
I already did the "fetch as Googlebot" thing 5 days ago. The page was successfully crawled and has been sent to the index successfully, according to Google Webmaster Tools. But in these 5 days, nothing changed.
I like your suggestions with the extra text. We will add some and do the "fetch as Googlebot" again and see what happens.
And you are absolutely right when it comes to the "value" of this page. It didn't send that much traffic, just a little. It is no big deal for us if this page doesn't get back into the index - but as someone doing SEO I want to figure out the problem Google seems to have with this page - just to test and learn for future problems 

