We don't even know what our asking price would be. And so far, there haven't been any offers yet. He has to come up with a buyer willing to meet his demands and that of our club, and in the current environment, that's not easy..
Who could that be? Liverpool? Are they willing to pay him 200k+, and offer us a decent fee? They've already considered Werner as too expensive, and Thiago's re-sale value would be minimal, due to his age. It's interesting Rummenigge mentioned Liverpool by name, while stressing there's never been any contact. Guess we'll know soon whether there is any substance to it.
Who else? City? Depends on the upcoming CAS ruling. If their CL ban is upheld, no chance. Real doesn't need him, PSG have Verratti doing the exact same thing, Barca is busy doing weird accounting acrobatics. Maybe he could beome a part of Juventus' midfield roulette, but we're not into strange player swap deals.
At this point, I'd still bet my money on him signing the extension after all. But, the transfer window being open until October, this could drag on for a while.