I would really appreciate if people would read the thread, and my responses, before offering advice.
As I've stated, I'm not putting my horse down.
You have to be honest about everything it does - just because someone lied to you does not make it right for you to repeat that and if you care about the horse you have more chance of finding it the right home by revealing all its faults so the buyer knows exactly what they're getting into than if you sell it to someone who gets hurt and then puts it on a one way trip to a slaughter yard
You don't want someone getting seriously hurt or worse on your conscience do you?
Remember this bit in the OP?
"And I won't sell him without disclosing his vices, because I think that's unethical and dangerous."
Have you considered that maybe he has a medical problem that is causing the bolting? What about things like saddle fit? Have you tried other training things like learning a proper one rein stop, or pulley rein, or taking his bolt away from him by making it your idea, or heck, attending bombproofing clinics?
The problem is not "he has all these problems and they are SO BAD RIGHT NOW." Like I've mentioned, he's been in training to work on these things. He's a LOT better than he used to be. Yes, he's very good with a one-rein stop as well as a pulley rein. Yes, we've done a TON of desensitization. The point is not HE'S SO BAD RIGHT NOW but rather "he has been bad in the past, I don't feel comfortable saying he's cured even if he's better than he used to be, what's the best way to deal with that?" If you believe that training will help, I'd like you to believe that training IS helping already.
Saddle fit has been addressed. I haven't had the vet out for the bolting because it's always been pretty clear situations of fear for him.
I apologize for sounding irritated. I am trying to balance the best interests of both my horse and myself, but please know that I will never sacrifice his well-being for my own.