That little mark on the tire is not "damage" at all. That's why I wanted a picture, that little mark is pretty trivial. I take GOOD care of my tractor, and I like for it to look good, but this is not serious at all.
Also most implements (nor even tractors) spend much, if any time, in a dealer showroom. They sit outdoors. So if you want a snowplow that looks like it has never been outdoors, you'll have to pay for it. Getting a few hundred off because there is some rust or fading on the mount sounds like a great deal to me, in fact, that's the kind of deal I look for, not used, but a little faded and save a few hundred bucks!
And if what you are looking for is a show tractor, I got no problem with that, but you are going to have to look far and wide to find a typical dealer who can even comprehend what you are wanting.
Have to agree with the others, this is pretty insignificant. Let it go. Move on. And if that dealer really can't meet your needs, keep looking and find one who will.
And since you keep your tractor looking so good, let's see some pictures of the whole thing. I love nothing more than a shiny, good looking tractor.