Serious question, why not sell it back to the chap you bought it from for the $5k USD that you advertised it at. He has offered.

I shall also explain why I called you out on your original post

1) You are attempting to sell on CT, it's your 1st post
2) You are selling at way below market value ($5k when you paid $9k for it)
3) Your image hoster is one of those generally used by scammers
4) You used words and pictures taken from the original sales advert on RF. If there's nothing to hide, why not copy the whole lot (which is a much better description that you'd used)?
5) Your tagged picture looks like a really bad photoshop attempt
6) You've blurred out more of the serial number than was already covered by the image in the original RF advert
7) Most of your pictures are extremely out of focus (anyone serious about buying this would at least need some clear pictures)

Additionally
1) The quality of your english varies enormously between your responses
2) You seem to have some knowledge of how I'd normally deal with scammers
3) You became hostile pretty quickly, instead of providing a rational explanation/proof of ownership
4) You appear have no other traceable forum exposure with your username and email address. Buying this type of watch usually involves some type of visibility or public interaction
6) Buying a 9k watch and selling for 5k just doesn't stack up. Especially when attempting to sell through this platform

It just doesn't smell right, but as you keep saying, it's your watch and you can do with it what you like.