I received a bad part. What should I do?

That sux. Unfortunatly what one person "thinks" is good shape a more qualified person can see its actually "junk". I think that you deserve a refund for the part at least if not the whole purchase including freight. As a seller, if something like that showed up on something I sold..... I would instantly refund the whole amount and apologize for the problem. Let hope the seller realized that the box he sold is junk after he sees the pics. (since he didnt look before)

Good luck... as far as what to do..... there is little recourse on a transaction on a site like this as it is buyer/seller beware. You made the first step in what you can do... if no resolve.. you know what your next post will be. ;)

-RPM