[Sopure]

If your friend says they're tapped out, and they know your entire purchase from tip to tail, it's tricky to get more-- because any of those 'perks' are accrued to the transaction itself and are paid for from commissionable gross.

Sometimes if you promise them a perfect Customer Satisfaction Survey-- just phrase it as "I can knock the CSI out of the park for you... if you.."

"...can help me get a good-guy deal on any accessories going forward."
"...can get me your cost on protection items, or a warranty.."
"...throw in some jackets or hats."
"...take care of my first regular service (typically an A-Service and some dealers will have a program set up for their Sales Departments as a nice touch for preferred clients or use it as leverage to close a deal up)."

Good negotiators will always offer something up and then ask something in return. I see so many people coming into the dealership, and all they do is Google "How to buy a car" and have the 'gimme gimme' attitude. It works to an extent, but there's far more effective ways to get what you want and more of it.

Buying a car or truck is very situational. It depends on the store, the personnel, what you're dealing on, how you're paying, are you trading in or just dealing with no trade, conditions of sale, delivery time, sponsored programs from the manufacturer, your physical proximity to the dealership itself, etc, etc.