Oh I don't think he will come, just wondering about hypothetical price.
Imo Bayern will sell for 30 million. If they think they could find a good replacement in the next 2 weeks, then they might even drop it to 25 million. Afterall this summer might be the last chance for Bayern to get 25-30m for Ribery. His repeated injuries (the man started only 59% of the Bundesliga matches in the last 4 seasons), his age [He's 28 and will be 29 next summer] and the expectations teams not to spend much from next summer onward, will make it hard for Bayern to get close to the money they might get this summer.
Bayern screwed up 2 summers ago when they refused to sell him for 65m. After that he missed almost an entire season and last year he again missed 1/3 of the season. Now 30 million is the best they can get but I doubt that anyone will offer them even that.