am using the Magic Box on Marketplace...when something sells, I have it set up to get an email notify...then I log into merchant home and de-list that item so a 0 quantity listing doesnt show up in my store (frustrating for the buyers). I also name each box and item listing with a unique ID (I use date/cat 140210 Snowshoe Blue girl for example) so I can figure out which cat sold. There may be a better way to do this, I am not an experienced Marketplace seller