The 22-year-old Argentinian has been linked with a host of top clubs across Europe but has yet to attract an offer close to Zamparini's £44 million asking price.
"De Laurentiis expects a big offer for Hamsik? He sees it like me as I expect a great offer for Pastore," Zamparini told Italian station Radio Kiss Kiss.
"Pastore for Hamsik? Pastore costs a lot, but if De Laurentiis wants him... I will see him tomorrow and maybe we can talk."