Barcelona president Sandro Rosell admits the Spanish champions want to sign Thiago Silva - but only if Paris St Germain agree to discuss the defender's future.
Brazil international Silva, 28, helped PSG to the Ligue 1 title after signing from AC Milan on a five-year contract last summer but Barca are determined to strengthen their squad with a world-class centre-back ahead of a title defence.
Rosell is sure coach Tito Vilanova rates the player highly and would fully support a bid but is concerned PSG's cash-rich owners, the Qatar Investment Authority, would have no reason to listen to offers.
Speaking to Catalan television channel 8tv on Monday night, Rosell was quoted on Marca.com as saying: "Thiago Silva is a player we want - the board as much as the coach. When it comes to him, the price is not an issue.
"We are negotiating with people for whom money is not a factor. And if they're not willing to sit down and talk, we can't do anything.
"It's a matter of the player convincing them to come over here and start negotiating."
The 34-year-old former England Under-21 international has joined the Dons squad on a pre-season tour of Ireland after committing himself to half a season at Pittodrie.
Manager Derek McInnes told Aberdeen's official website: "I'm delighted to get Nicky on board.
"To get such an experienced and talented goalkeeper is important and to get him during the pre-season stage is great for him in terms of being able to integrate with the boys.
"We had a few avenues and other options but we feel with the signing of Nicky we've recruited well and Nicky's eagerness and willingness to come here was pivotal."
Sheffield-born Weaver played 172 league games for Manchester City and can also number Charlton, Dundee United and Burnley among his former clubs.
The experienced keeper offers McInnes an alternative to current number one Jamie Langfield and Irish teenager Danny Rogers in north east Scotland.
