No, I would not buy a car online only. As others have said the internet is invaluable for research but there is no way I would buy a car without my wife and i trying it out. It has to be one that suits both of us, that we both find comfortable and useful. When we bought my current car, a Honda CRV, I set out thinking we would be buying a Ford Escape but after looking and sitting in and driving all possibilities locally we ended up with the Honda as we felt the layout and other amenities suited us better. You can't get that experience online.