wedding guest dresses for over 50

Im thinking about selling my Formal dresses. . Some of them are pageant dresses the others were for upscale celebrity events formals for evening wear. I have many pageant formal dress I have won in. Each one was only wore one time. Does anyone know how I can go about making this happen? Sure would like to sell them before my surgeries. I need some of my friends that are 5'7 or taller to model them so I can take pictures of them. I am unable to do it because I am no longer that fit in these sizes they very from 0-3-4-5. wedding guest dresses for over 50