The striker walked out on his hometown club following a row with the patron in 2007, moving on to Shakhtar Donetsk and Parma.
"I consider him already a Livorno player, albeit knowing he has not yet put pen to paper. It is a simple detail," said Spinelli.
"A strike force of Lucarelli, (Alessandro) Diamanti and (Francesco) Tavano is the stuff of Champions League teams.
"I would only consider selling them when faced with an offer that really could not be refused."