He's going to want at least €2.5m, probably €3m. Even the lower figure is twice as much as their highest-paid player. Seems unlikely. Maybe a Lazio or Roma or Napoli would take him on a free or low fee.
Looking at the league, Id pair him in a group with guys like Bonaventura (1.5m at Fiorentina), Politano (2.2m at Napoli) and Darmian (2m at Inter), older guys that used to play for bigger teams and had to downgrade due to insufficient performance.
Berna can want things, but if he doesnt renew with Juve and remains in Italy, I'd bet on him not getting anything over 2.5m, even if he goes the free agent route.