Sales tax I generally defend because it's not going to the business, it goes straight to the government. Removing it leads to cases where Europeans complain that the price of x is higher for them, forgetting their price includes a 20% VAT from their government. I think it's good to keep every citizen (obviously a large number do understand VAT, but it's not all) be reminded of what they're paying their government for.
But I recently was buying a vehicle and the otd price was 20% more than the price on their site, before sales tax/license fees. That practice is obviously anti-consumer.
So if you want to separate them out, put them both on there then. In fine print right above the total of them both added together. Even more price transparency
IME that is certainly the norm in many European countries. Where I'm from the labels usually say the full price and then the tax rate next to it, e.g. "120 EUR incl. 20% VAT" meaning the actual product is 100 EUR and the 20% VAT is already included in the 120 EUR price
But I recently was buying a vehicle and the otd price was 20% more than the price on their site, before sales tax/license fees. That practice is obviously anti-consumer.