Now, I may say "several sources" as I'm seeing this popping up all over the place in the last hour or so, but for all I know, they're all going off of a single source, whoever he/she/it may be. In fact, that's probably the case, so let's just go with Gianluca Di Marzio, since I think we still generally like him as someone who tends to get these sort of things more right than most. (For whatever that's worth.)
The offer delivered to the Blues is 30 million euro. Offensive important for a club that does not have economic problems and wants to establish itself in the European field. The Wolfsburg tries, Schurrle is the dream.
-source: Gianluca Di Marzio via Google Translate
Basically, cash-rich Wolfsburg may have Kevin De Bruyne lighting up the Bundesliga assist charts a la Cesc Fabregas in the Premier League, but they lack true offensive firepower* with just Ivica Olic, Bas Dost, and Nicklas Bendtner their options up top. To help fix that problem, they're hoping to sign Schurrle, whom apparently they've not watched much at all this season or are hoping that he'll rediscover his scoring touch sooner rather than later.
* Wolfsburg's leading goalscorer in the Bundesliga is center back Naldo (5 goals). In all competitions, De Bruyne is tied with left back Ricardo Rodriguez with 7 goals.
While Schurrle, an unabashedly enthusiastic Chelsea fan who's been battling some sort of illness as well supposedly, has struggled this season after a good finish to last season and a tremendous World Cup campaign, most indications up to this point have had him staying firmly put at Chelsea. Would this €30m, which, if true, would be a fair bit more than the €21m that we paid, be enough to change Jose Mourinho's mind and sell the 24-year-old?