I'd pay him a portion. No reason not to. At least make the gesture and come up with a figure you are comfortable giving. He can be upset or satisfied. If he does not get paid he will keep the bad taste in his mouth with good reason. If you pay him something fair he cannot be too angry. It is going to be a tough time out there for brokers for a while, so an initial intro payday would probably help him. If he ends up bad mouthing you along the way then that's his own problem.