Tunisair (TU, Tunis) has offered its four B737-500s and three A300-600s for sale in an international tender earlier this week. The tender also includes ATR42-300 TS-LBA (c/n 245) that had last been operated by Tunisair subsidiary Sevenair (Tunis) but has already been retired prior to Sevenair’s rebranding to Tunisair Express (UG, Tunis).