Who is the most difficult negotiator?

My answer is "D- A complete new customer". He does not know when to strike a deal.

B

B

All customers are diffcult neogtiator, because they are negotiating for the benefit of their organisation. However, I feel, "customer of your competitor" is diffcult to engotiate with.

Negotiation more dependent upon Personality of customer , but from above list B ll test your negotiation skills as he already got some options. 

I would definitely say option B- A customer of your competitor

Well in today Dynamic , competitive Environment, Customer is always difficult to read,

Whether it is old , or new.

Anyways i think Customer of your competitor is difficult to negotiate , because in which you have to more focus on market trend , price and try your customer in to the WIN-WIN  situation.

Negotiation becomes challenging in a situation where customer plays the card of competitors strengths and tries to extract the maximum.

According to my opinion, A complete new customer is the most difficult negotiator .

Because in that condition we approaching him/her to buy, Actually they don’t require the same .

i believe the toughest customer to negotiate with is a customer who  hasn't defined what he really needs.negotiating has to be built on clear grounds,both must know why and what they are negotiating.

i believe negotiating with ignorance is the hardest,.

I agree with Mr. Divyesh Patel