We carry around 23,000 posters, about 2,300 titles which range from political to psychedelic art to concert posters from the 60's and 70's. Many are rare and very hard to find elsewhere. The posters are in 2 storage units that are 10x15 feet each. I have dehumidifies that run 24 hours a day, shelving that they are kept on and plastic that surrounds the shelving for the flat posters and poly tubing around the rolled posters to keep thee dust and light out. They are warm, dry, dust free and in the dark most of the time.more