Also, build up the product. Say something in the descriptions like: "This poster is made to original specifications, just like the posters made 60 years ago whe

Also, build up the product. Say something in the descriptions like: "This poster is made to original specifications, just like the posters made 60 years ago when they changed the course of history." These posters are a niche product. They don't fill a need, they fill an emotional desire to connect with history. Build on those emotions. Some posters will sell themselves, for the rest, you have to sell them.