Business karma?

As some of you may know, I sell cars for a living for local automotive group. So my fiancée's real estate agent, who she went to high school with, contacted me last week looking for a specific used vehicle. Now, my fiancée was shown two homes before purchasing her home, paid full asking price, thus paying him some $1000s in commission, with barely any work or follow up on his end (we have not recommended him to anyone since our experience)

So when he contacted me, I find this very specific USED vehicle, all the features, year, model, miles, the only vehicle (only 4 with just the features in 200 miles of BR) that fit but was light silver (he wanted white/black). But I told him that since it was a used vehicle, I can not order him one, I would simply have to sell him that one or he can hope and wait for another one to come along soon (since they plan to do something before end of June, for family vacation, etc, it would be hard)that has all the features and color.

So he states that the color was acceptable, but wanted a $5,000 discount from my internet price to earn his business! I am lost for words, his wife is a stay at home mother, 2 kids in private school, they both own Infiniti vehicles, he is a nurse and real estate agent, no financial problems, even stated will put $15k-20k down. So why do I have to give away a vehicle to EARN his business and make nothing, when he made his $ on my fiancée when he "worked" so hard to show up late for both showings and the closing of our home? My opinion is to always keep business with people you know, positive! So if a friend gives me a deal, I give him a deal. I would never ask a friend/family to not make $ on my purchase, they have to put food on table and I at least know where the $ is going to a good home/person. Does anyone else agree with business karma?