I've sold a few projects in my time, but this conversation makes me think I should really look at having an agent represent me in future. The whole "I can only offer $7500" but then that turned into a $10500 sale just goes over my head - the communications skills needed are next level, and I've read Getting to Yes and such books :-) Maybe having someone less emotionally attached to a project could work in negotiations to increase the price to far more than cover their fee?