The Ligue 1 champion has offered the midfielder to a number of clubs, but has not received any bids as of yet.
The Ligue 1 champion is looking to offload some fringe players in order to balance the books and comply with UEFA's Financial Fair Play (FFP) regulations and the team is desperate to recoupe some of the 40 million euros it paid for the Argentine three years ago before his contract expires in 2016.
However, neither of the approached clubs has shown an interest in signing Pastore at this point following the 24-year-old's disappointing 2013-14 campaign.
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Pastore made just 18 Ligue 1 starts all season and has mainly been warming the bench since the arrival of Laurent Blanc last summer.
The midfielder himself is keen to stay at PSG, but the French giant is ready to cut its losses and will accept an offer in the region of €15 million.
PSG was hit with a €60 million fine for breaching the FFP regulations earlier in May, but has since stressed that the team will continue to buy the players it wants, reaching an agreement with Chelsea over the transfer of David Luiz for €49 million last week.