Most of the players weren't even signings that most top clubs would normally make
Neuer - 30m, been the best keeper in the world when he was signed
Davies- 10m, from an MLS team and wasn't even a leftback, Barca was interested but ruled him out because "a Canadian can't possibly be good"
Alaba - 0m, Youth Academy
Boateng - 13m, ManCity reject
Kimmich - 8m, signed from the 2nd division
Thiago - 25m, Barca reject
Goretzka - 0m, talented but almost noone showed any real interest
Gnabry - 8m, Arsenal and West Brom reject
M?ller - 0m, Youth Academy
Perisic - 5m Loan, Inter reject
Coman - 28m, Juve and PSG reject
Lewandowsi - 0m, worldclass at Dortmund, many clubs showed interest but noone really offered Bayerns wages.
With the exception of Lewandowski and Neuer even Wolverhampton could've gathered such a squad and at those prices especially. The Sane signing was probably the most out-of-character signing they made in years.