It was a one off! A7s weren’t selling and it was sat in the showroom. I do a lot of negotiating in my professional life and when trained was advised that the best place to practice was in premium car dealerships . Despite Porsche not generally giving discounts I have even managed to persuade them!! A deal is a deal!! Sadly something our inept PM seems unable to accept. Both parties in any negotiations need to feel they’ve done ok, it’s not a win lose situation. Walking away is often lose lose!! Once a deal is done it’s done. Breaking an agreement will mean no more deals... I’m talking car buying of course but applies elsewhere. Build a relationship, develop trust.