Rossi would have no problem accepting an offer where guarantees of a starting place are short, while it's not impossible for Sanchez to join him at Camp Nou, according to agent
The Villarreal striker and Udinese attacker have both been heavily linked with a summer move to the Camp Nou giants.
On Wednesday, Rossi said Barcelona's interest was nice, but he appeared unsure over his future.
Meanwhile, Udinese owner Giampaolo Pozzo said the club would only sell Sanchez if they received an irresistible offer.
And Pastorello feels both players would suit Barca.
"Barca could sign both [of them]," he said when asked by Sky Sport Italia whether it was feasible for the duo to head there.
Rossi would also leave Villarreal, where he has a contract until 2015, regardless of whether he is guaranteed regular football, according to the agent.
"It doesn't matter whether he has guarantees of a starting place. We are speaking with first-level clubs who play in different competitions with 16 to 18 starting players," he said.
"He has played in Italy, England and Spain so it does not matter what league it is or the project of the club."
Udinese expect anything upwards of €30 million for Sanchez, while the same kind of figure has been associated with a Rossi transfer from the Yellow Submarine.
El Mundo Deportivo recently claimed Bojan Krkic, 20, could be inserted as part of a deal for Sanchez and his agent Zoran Vekic responded to those reports.
"I know something, but there is nothing concrete or official. I know Barcelona and Udinese are speaking, but I do not know the conditions and whether it's just money or part exchanges too," Bojan's agent told Calciomercato.it.
The Barca player has also been linked with Roma, but Vekic described the talk as just "rumours".