The 52-year-old recently axed coach Massimo Oddo and immediately drafted in experienced 69-year-old Czech Republic tactician Zdenek Zeman as his replacement on an initial 18-month deal.
Zeman helped Pescara to promotion from Serie B in 2011-12 and will be handed the same challenge next season as the Delfini face certain relegation this term, sitting bottom of Serie A and 13 points adrift of Empoli in the final position of safety.
Sebastiani revealed that Zeman wanted to know if he was going to remain in charge of the club before he made a decision.
And when he was given assurances, the owner said, "it took us at most two minutes, maybe a minute and a half, to reach an agreement".
Discussing his future, Sebastiani refused to rule out a departure, but vowed he would only agree a sale if the buyer could take them further than he can.
He added: "I am staying, but obviously if I was to find someone who could make Pescara stronger than I can, I’d be ready to step aside."