They again raised the fee for this player but if you open the link you provided there it is clear that Oliver kahn as Bayern chief executive still insists on saying Lewa is not for sale. Seeing this, I doubt Bayern will accept the price and will still be at the same price tag as before at 45 million to 50 million.
But indeed in this case I like Barcelona's efforts to continue to insist on bringing Lewandowski from Bayern but indeed even if the price is raised but I still don't feel it will be easy unless they pay the full clause.
Barcelona just needs to take a decisive decision to take Lewandowski at all their financial risk. If in the future it can be much better because of the encouragement that Lewandowski can give to the club. rather than not having new additions at all next season, Barcelona will only have difficulty competing. The Bayern manager is clearly not going to sell for a low price for a Lewandowski, or when an offer can't be agreed, it could be another club offering a reasonable price tag.
The Bayern side did not even intend to sell him at all because even though there was a price there, they continued to refuse with all the proposals submitted on the pretext that they would only sell Lewandowski with the full clause.
This clearly becomes difficult for Barcelona which does have a fairly low financial strength.
But I agree with what you said, if Barcelona want to make Lewandowski at the Camp Nou then they have to be firm and be prepared to accept all the consequences.