Sure, add that to the list of disclaimers in the small print so that the customer from the next town over will have something to reference when the dealer cannot sell them the car for the advertised price.
The problem is that cars are not treated like most other commodities. E.g. You don't have to buy a license to use a microwave or register it with the government. The closest analog is if you live somewhere with sales tax.
> add that to the list of disclaimers in the small print
Correct. Instead of a vague "registration fees may apply" disclaimer now there's a "registration fees assuming <city>, <state>" disclaimer. It's definitely not worse for anyone, and is arguably better for the customers who will register in <city>, <state>. That's a green light for a utilitarian.
The problem is that cars are not treated like most other commodities. E.g. You don't have to buy a license to use a microwave or register it with the government. The closest analog is if you live somewhere with sales tax.