Upload & Sell: Off
Yes, he was probably banned. Was his name cannon100?
As a general rule, if they have no posts (I try to deal with people with atleast 300 posts) and no feedback, be wary. Everyone has to start selling somewhere, but use your common sense. Never use paypal gift as a payment method, consider your money lost if something goes wrong. If someone just registered on the site 2 days ago, and all 30 of their posts are "nice pic" "good photo", be wary.