Are you trying to imply that TS was trying to frame you using the Same model lens you sold him and with the Exact serial number? Too many coincidences ,you yourself would know its impossible.

To answer your questions,

First of all,how TS confronts with the original owner if TS isn't the person who deal with him and doesn't even know him at all. 'Salvator' known as the original owner was revealed after countless complaints have been made towards Silverfire. At least for me, I never ever thought Silverfire as a conman but he's indeed at fault for selling it unintentionally w/ knowing it was already faulty and not to refund TS.

"IF I were the con man I wont even appear here to even let you nuke me..." Not relevant to the case but here you go since you have asked http://forum.lowyat.net/topic/2163000 A great example for you to refer.