The vehicle must be from the current or one of the previous four (4) model years. Why not swap ad material and promote each other? This is a better option and works quite well but you still need to manually unsubscribe your customers, send the email from your computer over your internet connection and manually enter all signup requests including the ones that came from your website. The beauty of items like the Flagpen lies in the selfpromotion of the product itself it works for you!