American culture is all about the price being the price. With dealerships, you're haggling just to get the price down to the normal goddamn price, just because of middlemen.
I am happy to pay The Price if it means no bullshit and an assurance I'm not getting screwed. Make your car decisions based on the merits of the vehicle.
Variable sales tax rates depending on locale / product / usage / other arcane rules; variable tipping rates based on type of service rendered, customs, etc.; services charges, delivery fees, resort fees, convenience (of printing your own ticket) fees, so on and so forth...
No, I think Americans are quite used to not just paying list price.
Meanwhile though, literally everything done by people living in young urban "gentrified" areas seems to involve tipping.