There was a great Italian seller on eBay years ago, Intercard or Interposter, one of those. They would list massive amounts of posters every week with no description, only keywords like "horror" or "thriller". It would be a chore to click through and see the pictures, especially in those days of slow dail-up connections, but it was worth it. I bagged many of my best posters then! And the shipping and packing was perfectly reasonable, in big stiff cardboard sleeves that made the journey to Sweden with no fuss. Ah memories!