I have posted and sold a few items on here and never had to pay anything up front. I did make an honor payment after selling it because if not for the site, I wouldn't have sold it. When you post an ad it asks you what you want to add as in advertising, you can choose the basic and it is free and you can add things that cost (both of which tell you whether it is free or cost money, it is up to you which to choose). So Yes, you could have posted it for free if you wanted. That is why I look at who makes honor payments and who don't when I am buying something. If someone shows they have an average selling price of whatever and no honor payments I usually keep going.