Stella McCartney - I admit she has some really cute bags, especially her mini quilted backpack with a chain trim on the flap (pictured below). But I can't justify paying THAT much on PVC/Fake leather.
Picture credit: Yoogi's Closet Facebook.
This was how I felt until I ordered one at a good price with the intention of returning it if it didn't work for me. But to be honest in real life it is pretty amazing and I couldn't bring myself to send it back. A few times I have considered selling it but then I get it out for photos and realise how lovely it is. I did get it at a good price though, I probably wouldn't pay full price but I know plenty of other designer bags priced A LOT higher than these that are coated canvas or PVC.... sure those designers also sell leather bags but some bags are all PVC or coated canvas and selling at much higher price points but theres never any negativity about those.
At the end of the day its the "high end designer" brand name we pay for regardless of materials.