Best practice is to secure your full business name and 1 or 2 shorter combinations or abbreviations. Forward the your longer domain names to your used car website.
Choosing a Domain Name Registar. While you can't go wrong with the GoDaddy.com pricing of $8.95 per name it's checkout processes is enough to give anyone a headache. All the tedious upselling just to buy a domain made me transfer all my domains to www.directnic.com . Simple, easy to use no frills. For a few bucks extra a year it's worth it.

Used car websites by Factory51 Design.