How to sale product or service to Negative Person

Sometimes customers are not in a mood  because they maybe have stress on their business but remember that a good sales person can change to better or worse here some tips

●smile
●always friendly
●show confidence
●try your best 
●dont exaggerated simple things
●ALWAYS the truth
●show passion for what you know
●show that you are ready to help
●Never blame anyone

If the prospect is negative go with the flow but ask questions to know why there not happy with the product or service and take a note in front  of  them so is like you show them interest on their unhappiness

Say "thanks for sharing" (your negative experience) and give your information before they say anything  smile

How about people tell you "no im not interest" you said sorry about that i dont know but its ok... then you look arround the place and ask about pass experience with some other product or service and look and listen carefully  then maybe you can get information then give yours later
ok so i give you my info for next time...

If a customer said i don't want tour information! pick it up and said : ok sir, i will give to your neighbor if in case you need it. just ask them... thanks... smile and go...

Never feel bad. some customers change their mind when they see the neighbor business are saving more money if is a service or they use your product  first... so always  expose that part...

I hope this tips help...