Advertising cars would never be feasible on nationally broadcast TV under your system.

They did figure out the problem though. Price set by the manufacture, show cost for delivery on the window sticker, then when you buy they car the title and tax are figured out for where you live. It’s the fairest and easiest way of showing and figuring the price. If you can’t figure out that window stickers are available online and the tax and title yourself before you buy, that’s a you problem. It’s not on the seller nor the manufacturer to post pricing for every state or municipality.

If you want cleaner pricing, demand an end to titling and car taxes.