Right now, while I am considering getting an LS backhoe for my R4010, that info would have been extremely interesting to me. As much as I like my friends at the dealer, I don't want to deal with them from a point of total ignorance, unless I want to think of myself as Santa Clause all year long.
The profit is all profit, and the overhead is all overhead. The dealer deserves his cut, for he does have his overhead. He works for his profit by getting as much as he can. How much he deserves for your doing business with him is a judgement call. If he burns you, or even makes out well on a deal, he'll never tell you. You, in any case, are not ever likely to burn him, because he always holds the aces. We don't see his hand unless he shows it, and if he shows it, is that really it?
I hate the game of haggling, but I would still like to feel we both play Santa Clause at times. I don't think dealing on this level is a whole lot different than Vegas. They are not there to lose money. Knowledge is power, and if we want any power, we will have to get our knowledge somewhere. I don't think we do each other any service by keeping each other ignorant, when we need not do so.