I'm just going to say that distrust breeds distrust. If you approach this sale with the attitude that the buyer is going to rip you off, the buyer will almost certainly sense your lack of trust and reciprocate. Personally, having read this thread, I would probably not be interested in buying from you at this point, especially since you are selling a watch that is available from other sellers. Dealing with a distrustful seller is just a pain in the neck, and not worth the trouble IMO, unless the item is so unique and special that there is no other option. Keep in mind, given your lack of feedback and selling history, frankly there is no reason for a buyer to trust you, while a buyer on this forum may have significant history and feedback. Try to keep things in perspective and see the situation from both sides. If you can't empathize with the other person, it will be difficult for you to make a sale.