I hate buyers that after they have won ask a million questions. No matter how patient I am it never goes right after that. I am sorry this happened to you. Hopefully it will be over soon.
I have no intention to defend the particular buyer, but asking questions after bidding serves quite a clear purpose for a genuine buyer, and I have to say that this has become my policy when buying on ebay! When you ask questions after the end (for example, the listing ended before the seller had a chance to reply, etc.) - you have 3 scenarios 1) O.K. friendly response from the seller - willing to help - then you know the purchase is safe and the seller is sweet (my purchases from such sellers were the biggest successes, and I left glowing feedbacks for them) 2) annoyed response, but some answers - still genuine seller, can proceed 3) annoyed response, no answers - only proceed with great caution, if there are signs that the item is definitely authentic from photos, and film the opening of the box on video! 4) rude response - RUN! do not pay!
I think, a genuine seller will be glad to answer any questions of the winning bidder- to provide reassurance to the worried buyer who commits a lot of money!
I would highly recommend, when you buy an expensive designer item, ask some additional questions after bidding, before paying - this would be the best way to test the seller and have an additional info re. how this seller would behave should anything go wrong. And you actually would prevent a scammer from dealing with you! They will run a mile from such a buyer, they like to scam trusting, gullible people!
Nothing to do with buyer's remorse. 5 of my sellers answered my Q. happily - their bags were delightful. 2 sellers were annoyed- their bags had little nasty flaws undisclosed in listings (I still left positive)! 1 seller was so mad, he declined to sell to me and at the same time made a strike
for non-payment - all his goods turned out later to be stolen from a store!