AFAIK, everyone who's ever bought a Tesla car has bought it online. In the states Tesla is allowed to sell directly, the process of buying one in the store is being sat at a computer and being guided through your online order with a sales rep's help. They don't have cars on lots you can purchase and drive away. The stores are all basically showrooms whether they're allowed to sell cars there or not.
Ha! Maybe they could set up QR codes to link to the pages that discuss the pricing, or just have signs all over that tell people to go to teslamotors.com on their smartphones, and to contact their legislature if they think this is a stupid rule.