Well, each to their own. I personally couldn't give a toss what my competition are doing in terms of their financials, I will look and sometimes pinch ideas that I think are good but whether they are making or losing money is irrelevant I think. I spend my time buying and selling cars and so far, I seem to be quite good at it and wouldn't bother if I was earning 2% on T/O. Spending my time researching how much money a competitor is making or losing is a waste of time.
You asked "who is making a healthy profit" and I believe many people are, I am one of them but of course, for very obvious reasons I am not going to disclose the reality in a public domain and neither would anyone else who has half an ounce of sense. Sometimes I think some people on here can be quite pessimistic or despondent about this industry and I personally don't see why. I don't go to auctions, I don't listen to other traders unless I want to, I don't believe everything I see or hear and I can only speak intelligently about my own business and those of those other traders whom I am close with and on that subject, I know of several dealers who are doing enough to pay themselves well and be their own boss. Beyond that, who cares, really?