Papers, it's not like Dortmund send us a quote or a pricing option for Micha, we know about 40m euros (30m pounds) in the same manner. From papers.
Don't see how that is relevant. Micha is as eager as they come, last year of the contract and we still can't really get the proper deal done.
I don't think it's about all this rebuilding stuff, many teams rebuild, don't feature in CL and still do great deals. They even get players from CL-clubs, like Spurs got Ajax's Eriksen for 11-12m. And he was like their top player etc. It's about having a good groundwork, having lots of options, so that you are not cornered and so on.