You can't sell something to someone who doesn't know you, unless they really want it (are already looking for it!). (creativindie.com)
These are individuals who will learn about the products and the application and removal process, then sell them to other customers just like yourself. (theheirtoblair.com)
If you have just bought a puppy, make sure the person who sold it to you has a vaccination certificate signed by a veterinarian. (k9puppydogs.com)