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I did some research into the story you posted and found out you do have to sign a contract. If you click on the link and go about 3/4 of the way down the page to where it says (IMPORTANT NEW CLIENTS!) you will see the contract that they want you to sign. 
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Damn I must have been spaced out when I typed that.. I didn't sleep nuff.. Anyways
Well I figured he was talking about the original contract and since I wasn't in too good of a mood, I wasn't too polite
Anyways, you have to be 18 to use eBay so every eBayer can use them.
I use eBay, but I have either of my parents do the actual operation. I don't have the password to it.