What's The Dumbest Thing You Have Done on Ebay?

i tried to sell stock tips subscription of my website through ebay .i didn't single response

I was buying coins on e-Bay and at times would get overly excited and lose track of what I was bidding on. The end result was buying two of the same coin. The worst case was buying two coins for $80 each. If you want to try selling items with a set price, you might look at Amazon.com. They don't take as many items, but the ones they take can be listed for free. You only pay fees if they sell. I've listed several technical books there and I'm also planning onlisting some GI Joes if I ever get around to photographing them (and figuring how to load the pictures.)

I haven't done anything dumb, but buyers have done really dumb things to me.
For example, I put for sale a brand sweater, and I set the auction to 10 days. The 1st day a person bid for it, and that person was the winner. Then that person changed her mind about buying it, so she said that "she wasn't buying that because she hadn't bought it". She was answering all my messages very quickly, so it was very suspicious and impossible to believe that in 10 days she wouldn't notice a "bid that she didn't do", so of course it ended up in a dispute. People should be more bright when they make up excuses.