The top Turkish clubs can definitely pay more than 500K, so I wouldn"t be surprised if she goes to Turkey sooner or later, or Italy has to keep winning cups indeed.
I remember few years ago, Fenerbahçe talked with Egonu and had a great offer for her and she really was down and wanted to go, however she said she was annoyed bcs Club Italia didn't allow her lol. I think the rumours were the bid was something like 600-700k a year.
The top Turkish clubs are really insanely rich, only reason they don't offer more yet for players is because its not needed yet in the market. To put it into perspective the Eczacibasi CEO just on his own has a net worth of over 2 Billion$