The delicate balance of selling while still being pleasent and not overbearing is nothing short of an art.
It's a talent that all of us can cultivate but that some have a natural gift for.
Be nice, honest, organized and helpful. You can't go wrong using these timeless techniques.
Do not be pushy, aggressive, sneaky and manipulative. You will lose every time and any short term gains will definitely disappear in the not so distant future, guaranteed.
Wishing you continued success!