Just spoke to the pc repair shop on the phone. They've said they've received some abusive emails from the seller. The guy who tested the graphics card is actually the manager of the place so i dunno.
Video looks conclusive though. Only thing i thought is if he had plugged in the connector to the monitor slot and not the graphics card slot on the machine.
So either its a broken graphics card and the seller has done a pretty impressive job of making it look like its working.
OR the pc repair shop lied/incompetent and didnt test card or didnt test it properly.
OR the card didnt work for me or the pc repair shop but did work for the seller's pc - is that possible?
Where is MONK when you need him ehh!