Bad classified ad RC purchase, what would you do?

[simplechamp]

It was about $15-20 if I remember correctly. I'm not looking to post about the experience to other members of the forum, just deciding whether to leave a negative feedback on his trader rating. I have already brought it up in a PM and will see if he offers a refund, but as I said I almost feel like he doesn't deserve a chance to make it right for being intentionally deceptive.