what i meant by white hat method was that the person selling his car will fill the form correctly, unlike someone who will do it through black hat and will just BS the form just to get leads. There is no way the affiliate can find out that you are doing this through craigslist. What you can also do is create a website and just redirect the seller to the offer.
Why would the seller fill the form? When you said "Great I will take it... etc" Thats telling the seller that you are agreeing of buying it at the full price he listed it for, unlike most people calling him low balling his price on the car!
ALSO, as i said up on my message that my message is not at its best. Someone mentioned why would we say "I can only access wifi" which was a dumb thing to say. You can say "i do not have access to the internet, only to my email" You can edit the message, you do not have to stick to mine. You can be creative in your own way.
Lastly, stop B*t%*ing about if it is legal or not or if it will convert or not. TRY, TRY TRY.