Programme writer to intergrate the process of selling on auction sites

i am looking for a programme to enable automation of selling on ebay amd amazon..to write 1 listing that can be transfered to 2 ebay sites and 1 amazon site.with the option of the listing going to lots of other shopping channels like my.own website.also,a 1 inventory control system for all of the sites.plus a easy to use system for back end order printing and accounts,maybe sage or quick books