http://www.football-italia.net/75866/lower-juve-wage-lavezzi
"Tuttosport have reported that this imminent expiry means the Old Lady could sign Lavezzi for as little as €2/3m, but the real negotiation will be with the salary.
The former Napoli forward currently earns €5m per season in France, but Juve are believed to be offering €3.5m for two years with the option of a third."
so it's at least a ~16-17m operation, that would make lavezzi our 4th most well payed player, on par with marchisio, chiellini and mandzukic.
on a sidenote, mandzukic also earns too much, it would be bloody hard to sell him.