There are certainly plenty of pessimists about AutoNation Inc. , as shares have sold off the past year from $65 to about $48 today. Are the pessimists correct and is the drop justified? Or is this an opportunity for a realist to buy from those pessimists and benefit later when sentiment changes? For that matter, guru Mario Gabelli recently added AutoNation to his portfolio, and Edward Lampert and Bill Gates are among other gurus who own the stock.