All that is mathematically correct, but way too simplified and looked at from today's perspective.
Imo, this is the catch:
13m+Matri+Pazienza might actually be more than 30m eur right now. But Fiorentina refused it for a simple reason. Matri and Pazienza together earn even more than Jovetic. That means they need to pay more money for wages. After a year or two, if they decide to sell Matri and Pazienza, they might get at most 8m eur or so. That means (
13m they get now)+(8m they will get in 2 years)-(some 2m eur more they'll pay for wages) = 19m eur. They calculated that they'll get only 19m eur if they accept the 13m+Matri+Pazenza deal, even if at this very moment 13m+Matri+Pazienza is actually worth 30m.
Now, 22m+half of Marrone. At this moment it's around 26m eur, which is less than 13m+Matri+Pazienza. But Fiorentina know that Marrone is quality, they know that he's young and sellable after 2 or 3 years and on top of it he'll earn three times less than Jovetic. If Marrone develops as they expect, they might get even 10m eur for his half in two years and that means: 22m+10m+2m they will save on wages = 34m eur from Jovetic.
You get what I mean?
It is simplified, but some ppl still have difficulties to follow...
Indeed, that offer would be worthy of more value overall, but they dont seem to rate Matri and indeed they want to avoid those salaries.
I think that Jack is right and its prolly media BS, but if its true that they have asked for Marrone, then we a strong bargain chip.
If we were to buy him from them, after a display like the one he displayed vs Inter, they would force us to play about 10-15mil.
I think that they will try to pull a new Giovinco on us, smth like you described, force us to pay much more money for his half in a couple of years from now.
Look how much we have spend for Gioivinco's half now, like he is worthy more than 20mil...
Thats why i hope that we will avoid the co own deals, Marotta is owned big time there, as you have assumed, we might end paying way more than 30mil in the end.
So i d prefer to negotiate his full contract. If they are ready to make an 8mil reduction for half of his contract, based on the fact that we will buy him back.
Hopefully for his full contract, we will achieve a better reduction (hopefully above 10mil, not that they would spend that cash, but as a reduction its easier to negotiate) and lose less money as well, when we will buy him back.
(as i dont think that we would spend 22mil to buy back Giovinco, of course there are no limits to Marotta's stupidity, the man has spent 13 mil on Martinez...)
If we spend less than 20mil, with Matri sale or Giovinco's trade, we would achieve a great finisher capture too.
IMO it is imperative to capture a great finisher this year, the extra SS and CM are just luxuries, so i d sacrifice some to secure our priority.
If we spend more than 20mil on Jovetic, we might not have the money to buy the starter finisher we need the most.