Can you advertise on WikiAnswers if you have a vehicle for sale?
No, sorry this is not a classified ad forum.
You do not advertise at WikiAnswers, what you can do is have links to your website via your user profile. WikiAnswers is starting to utilize Google AdWords on its site, so if you would like to advertise in the answers, my advice to you is to open an AdWords account. See the related link below for the Answers Cloud Services page where companies can request information on how to advertise there business on WikiAnswers.