purchasing question

[xyphy]

Hi,
This is officially my first post. I have my eye on a used 16610 y series sub date.
it seems like a good price, it's on canwatchco forums. I have a few concerns that I was hoping on getting some advice. The seller seems legit with a few references, but the watch is an older model purchased in Kowloon. so 2 things, how do I check it's authenticity? Is there a dealer that will authenticate on site somewhere? (do they charge for this type of thing?).
and what is the best way to do a F2F meeting?
Do I look at the watch first and make sure I love it then arrange to meet again with the cash? or do I bring the cash with me and if it's the watch I want, then just make the deal?
is it better to get a bank draft prior to meeting and finish the transaction in a bank with the seller cashing the bank draft?
I appreciate any advice.
thanks.