Of course it is not relevant. Customers should negotiate based on what they value the purchase.
Dealers want you to dicker based on their mythical profit/loss on a vehicle. They are trying to make you sympathize with them, & make you think you are being unfair. You wouldn’t want to be unfair, would you?
If the dealership cannot make a profit, I could care less. That is not my responsibility. My only priority is the best vehicle at the lowest price.
At best, sticker prices, invoice games, & the like only give you a starting point in the negotiations. Research on the Internet is a much better way to prepare to deal.
My wife taught me this trick. It has saved me money & heartache over junk products. Read the reviews of a product, especially the negative reviews. Good reviews are often quite general, “Great product!”, & such, but bad reviews are more often very specific, alerting you to aspects of a product you may not like but wont find out about until after purchase.
You totally missed my point, and you have a shitty attitude towards the notion of business and profit. I think you might feel more at home with liberal anti capitalist websites. I can recommend a few. Of course, they might make a profit off of your click thru’s and we wouldn’t want that....