I found a previuos thread where SBJUNKKIE purchased a TCU from a forum member becuase he had a bad one. He posted for a MOD to deleate the thread but it was still available to be read.
Since he lied about the shipping date I am now concerned that he sent me the bad one that he took out. If I remove it from the package and test it, I have no way to prove to paypal that I haven't switched parts. Or that my car didn't caused the TCU to fail. It all falls down to the fact that SBJ lied so I can't trust anything that he said.
The safest thing for me is to leave the TCU it in the package and wait for paypal to make a decision.

If we had a seller feedback section we could atleast look at how long a seller has been active on the site and if other have had problems with the seller.