Seller wasted my time by listing the wrong size item

I found a pair of brand new Nike Air Force 1 sneakers on Marketplace for a good price and the seller said they were size 11. I drove 20 minutes to to meet at his apartment and he showed me a tried on pair of sneakers that were a size 10.5 without the box. I told him that the listing said they were a size 11 and he said to try them on. Another day, a seller told me a pair of sneakers were 100% authentic and they came back replica after I put them on a sneaker authentication app. I hate dishonest and sketchy sellers on Facebook Marketplace