Unlike last relegation, This time Real Zaragoza players have a higher wages than few years ago which sweetens the staying at 2nd division.
Diego Milito is being payed around €3M/year as he had his contract renewed last summer. However, board promised him shall the right offer arrive, they would let him go. At the moment there have not been any relevant offer in the region of the €12-16M so the player has to stay.
I have heard clubs like Everton, Tottenham, Napoli and even Roma eventually asked for him, but I guess they do not find him attractive enough.
Valencia is also a club interested, but they have to sell some players first.
Also Marcelino -new coach- asked Agapito -owner- not to sell every striker. Finally It seams all of them are staying, which makes a terrific attacking line for the upcoming season.
Thanks for the praising words regarding Aragon and Zaragoza. I don't know if you knew it, but we are hosting an International Exposition between June and September. The city has been renewed and lots of facilities have been built for this event.
In my signature you could find information.
Cheers!