OP, the commissions are a lot of money today and for high-dollar horses. I feel you there.
But unlike real estate, most pros most of the time don’t sell lots of high-dollar horses lots of the time, so they want more from each sale. That said, I think it’s a fair question or criticism of this industry to ask why expenses are distributed as they are. E. g. Why does the cost of day care at a show seem so high? On the other hand, why is board set up to be a break-even proposition? Why do so many pros make more buying and selling than they do training or teaching? Why don’t we pay people who start our young horses more and those riders who can/will bail us out of our training mistakes even more than that? But the bottom line is that you will/do have to pay these highly skilled, seasoned, established pros the fees they command. Or have an adult negotiation about it. There’s nothing wrong with, business-person-to-business person, asking for what you want.
I think you are just bumping up against a surprisingly large wad of cash that you need to pay out for a service or product you don’t find as vital as all the other stuff you have paid for along the way with your expensive horse? Or do you just not like paying commissions both coming and going? I don’t love the second scenario, which has become common.
Back when I was a sprout, it was only the seller who paid a commission to the selling trainer and that was 10%, but perhaps more for the less expensive horses. That made sure the trainer, who presumably works as hard to sell an expensive horse as a cheap horse, still finds selling the cheap horse lucrative enough to bother.
The Seller then paid their selling trainer/agent. That pro then distributed smaller percentages of the commission as needed their other colleagues in that deal. And people involved can get greedy, holding out their hands for having done little bits of work.
The selling agent can, in theory, tack on a percentage to the price that covers everyone’s commissions. I don’t like this kind of horse dealing unless I agree to the kind of deal where I say what I want to get out of the horse and allow them to pursue a higher price (thus earning a higher commission) if they think they can. I don’t care how this goes, so long as there is transparency.
The buyer’s trainer might charge some kind of “finder’s fee” (presumably for the networking and pre-screening of horses done). Or that pro might charge an hourly rate for this same kind of work. Their network itself has value, for which they want to be paid. That’s easier to accept if you remember that it cost them a lot of money to get into the circles where they would have enough credibility to find the non-rip-off $200K horse, or get someone else’s client to believe they ought to pay that for yours. If you don’t think that’s true, ask yourself if you’d like me, an educated, fair-minded by random internetter, to broker the sale of your expensive horse for you. If the answer is No then the truth is that reputation and access to others has value to you.
I am sorry that you’ll have to write a check so big. But remember that you’ll be getting and even bigger one.