A bus (which Gok already mentioned), more than anything else.
A Taxi (again mentioned by Gok).
A lizard without some misplaced frill.
Any marsupial. BW Snarl does not count - he's sort of like a dunnart, but is not an actual marsupial.
A realistic submarine that's not a Minicon. We've never had one!
A Battleship.
A fork lift.
(BTW Gobots gave us these last three!)
Less generic sports cars would be nice...