As a developer, I'm not that desperate to buy .eu, I'd rather buy the .co.uk or whatever country domain. Magazines are very specific to a country, so the .eu doesn't really offer much advantage. I would like to be more bullish but I think the best answer you will get is to invite offers on forums and see what happens, that will answer your valuation question.
Development wise though it's a good domain. There's a good market to attack, so it might appeal to someone on here. The EMD might give you some advantage on bing or yahoo.
Rgds