My guess is that the "worst that can happen" is that someone says YES (what do we really expect him to say?), when the answer is closer to "NO".
(If the question is " Say, Good Buddy, I'm gonna buy my tractor somewhere else, and deny you your idea of a fair profit, and then bring it to you for service. Will you take care of me in just the same way as your purchasing customers?)
If we don't trust him to be "fair" about his profit margins, why would we trust him to really mean "Yes!" to such a "Have you stopped beating your wife?" question?
If I were going to shop price, and make a purchase accordingly, I'd just DO it. And then bring my tractor in for needed service, with no up-front reference to where it was bought ( though I wouldn't hesitate to say, if asked ...and if the quotes were so different that I really had no sensible choice, maybe the dealer might give some thought to adjusting his price to better-meet the competition.)
I chose the route of getting (9 or 10) quotes from dealers that I might realistically travel to for a purchase, and then give my preferred ( closest) dealer a shot at it.
He didn't feel he could get closer than $500 to the lowest bidders, but all things considered, that was close enough for me.
I don't think my service-treatment will be hurt by the fact that I gave him a chance to keep my business, and that I was willing to pay a little more to stay with him all-the-way.
I did this in no-small-part because of the emphasis placed on the importance of a good dealer, by posters on Tractorbynet. My salesman has been EXCELLENT in working with me on some special details, and I have a friend who has bragged to me about the service dept. That's about all you can hope for, in my opinion. Anything less would add up to $500 worth of aggravation (or lots more) in a hurry! My chosen dealer...Fisher Implement, West Salem, Oregon / Salesman - Jeff Miller.
My reading of the original question mirrored one of my own..."How does the long-distance customer (of let's say "Carver") find his service needs being met, and what IS the real attitude of the servicing dealer?
Larry