An attorney representing former Upper Crust workers in a class-action lawsuit, former Upper Crust managers, and a private equity firm with ties to company founder Jordan Tobins are among the bidders for the bankrupt pizza chain which heads to auction on Wednesday.

More than 60 parties — including national brands and small businesses — initially expressed interest in making a bid for the gourmet pizza company, according to Mark G. DeGiacomo, the trustee overseeing the bankruptcy of Upper Crust. But DeGiacomo would not identify the number of proposals submitted by Monday’s deadline, except to say, “We’re very pleased with the amount of bids and expect a lively auction.”