I made bad experiences as a buyer and a seller.
As a buyer an item that I knew was genuine and had a flaw (seller mentioned a scratch at the bottom of the bag) was cancelled, I tried to contact VC that I do want the item, no reply, just that the order was cancelled due to non-compliant. I managed to buy the bag anyway on another site, same seller and I am very happy with it, VC was uncommunicative to the extreme. I thought it was a rare incident and risked selling my items, making sure I always describe each issue and try to take pictures of every small scratch and mark, you would think it helps, actually it didn't. A lot of items went through without a hitch, but then the odd person not reading descriptions cancelled, on top of it 2 items with direct shipping were swapped by the "buyer" for worthless items, and really nasty things were returned to me, trying to contact them about it did not work, the same automated answers. The shipping also lost one item, I had to jump through hoops and give them really sensitive confidential information, like a bank statement and my passport just so they would open an investigation with the carrier they forced on me.
There are also a lot of problems with using the website, not all the features work, if they promise you a voucher, you have to use the app, given that the app also has a lot of problems (I once used it briefly and deleted it when I found out they track you everywhere).
I seriously worry about giving confidential information to a company that can't even keep their website updated so it works and figured I rather not sell or buy through them as they seem to have no interest in any kind of customer service. From the replies I received from customer service, I am not sure if they didn't understand or didn't care, but they all seem to have access to your private information. We are living in a time where identity theft is a serious worry, I prefer to give such sensitive information to companies who maintain their sites, not with flashy ads but with having the features available for every user. I deleted my account because I simply don't trust them.
I heard they raised millions, shame that they didn't invest the money in customer service or accessability.