Good luck getting dealerships to spend high dollar on something they don't believe in. Best way to get your foot in their door is with a "wear and tear" package of door cups/edges and luggage protection for around $100. See if they will let you do one for the showroom floor on consignment so it virtually costs the dealership nothing at that point.
One big key is to get a meeting with F/I or general sales mgr. Insist on there being at least two managers at the meeting. This is important because you will be pitting them against each other in your "closing". State your points on why its a great money maker for them. I know of dealerships that easily clear $20,000 in a slow month so its a proven fact. Carefully craft any questions you ask them so you get a "YES" for an answer. You want them to get in the habit of saying yes.
Now, tell them their dealership could certainly do $10,000 a month, look both of them in the eyes and say "Which one of you doesn't want to show your boss you made them an extra $120,000 this year?", then remain silent because the next person that speaks loses. They can't say no to that or they will look like a weakling in the eyes of the other manager.
