No they don't, not outside the EPL anyway. Since mentioned players are more reluctant to go abroad the potential circle of buyers shrinks. Spanish giants, Juventus and Bayern poach domestic players at low prices
Obviously depends how wealthy or desperate the selling team is. In La Liga many sides are absolutely broke, same as lower end Serie A. Fiorentina don't fall into that category, and you have to consider the Juve factor with them.
Real Madrid and Barcelona have the dual benefit of strong youth systems in recent years and the bargaining position of low buyback options on the best domestic players they sell to other clubs. That is their take on the co-ownership deal.
I've no real idea why Bayern get such value for money with Germans they buy. Half of their moves seem like a piss take to me, they must have incredible leverage on the other sides. You'd never have Italian sides selling potentially world class or world class players for actual transfer value, not to Juve (without clauses).
It's not an immediate value for money move for Juve, but like any signing it all depends how the player does on the field. Transfers are judged twice, ultimately.