I just had a good experience buying from a Vestiaire private seller, so I thought I’d share. It was definitely largely due to this thread, which had great tips on buying from private sellers which I followed. The tips were posted way back but I found them by searching

Thanks as well to the kind TPFers who gave their opinion on my purchase as well.
I bought a Ralph Lauren Ricky bag from a private seller in France. We had been bargaining back and forth, and eventually I caved to her final price because it was so good and just $40 more than my price. I waited for a free shipping coupon, and also the dollar was slightly stronger compared to the euro, so I ended up spending $836 just on the bag, no extra taxes or shipping costs.
I'm located in the northeast US, and my bag was delivered exactly one week after I ordered it. The seller was very prompt with shipping off to VC quality control, and once it was there it was processed and shipped to me within a day. I received the package two days later, which I had to sign for. I was really happy with the minimal wait.
I'm not sure if I will get dinged by customs. I wanted to keep the price under $800 to avoid customs, but I didn't see any paperwork in my package, nor did I pay any customs upfront with my bag even though my initial subtotal on the VC app included taxes. For some reason, as I moved further along the checkout, the free shipping code didn't work but did as I kept clicking through. The taxes went away as I clicked through as well. I guess time will only tell if I can get away from customs!
I was a little disappointed with the item. I believe it is authentic, but the description said "like new never used" but it clearly had been. There was slight tiny wear throughout the body of the bag. However, the price I paid was a ridiculous steal, literally 78% off retail price new, and I'm also not fussy about my bags looking perfect so I decided to live with it. My main tip would be to ask for close up pictures. Ebay really does have far better pictures.
So overall, a good experience! Let me know if you have any questions
