Found this on BILD, sorry for the translation.
http://www.bild.de/sport/fussball/r...-fuer-ihn-sind-realistisch-41135020.bild.html
BILD interview with Peter Rettig (52), the managing director of TSG Hoffenheim.
IMAGE: Firmino, your big star, Hoffenheim will leave with a high probability in the summer. If the complete transfer fee to return into the team?
Rettig: "We have generated deficits in recent years. It is therefore important, in the future to achieve surpluses. If he actually brings as much money as you can read in the newspaper, we are not guaranteed invest everything back into the squad. "
IMAGE:
We wrote that Firmino up costs to release from 30 million euros.
Rettig: "I think that's not unrealistic. Roberto has here become a top player, he has become the Brazilian national team. But I also know not constitute an offer. Therefore, we have to wait. "
IMAGE: Keep out there for him to stay in the Bundesliga?
Rettig: "I do not think it is first time out of the question that he remains in Hoffenheim. I do not consider it impossible that he will remain in the Bundesliga. But with a transfer abroad you have to expect in principle. "
From whatever I can interpret, they think they will have to sell him. They also talk about moving abroad. If someone can read German, it can give more clarity.