If you know more about your product than the people you are selling to, and certainly more than those who you buy from, then you are in a very good position.
Hadaba marka aad isku soodardarto tirooyinka hadii ey wadarta takhasus wato ey ka badan tahay kuwa kale wadar tooda ogow takhasus-kaas ayaa kuu qalma ee asaga dooro.