Sales Negotiation deserves more space in the training industry.
There are many books and resources on Negotiation, each with a different focus: Legal Negotiation, Hostage Negotiation, Purchase Negotiation... but there are only 3 on Sales Negotiation.
Patrick Tinney is one of the few authors who delved into it in his book 'Unlocking Yes,' one of my favourite texts.
Furthermore, he's one of the few who believes companies and people should invest more in the development of Sales Negotiation - because it is totally different from all others.
I had a chance to interview him, talk about his books and explore this and other concepts in this podcast - enjoy!