The most a buyer is willing to pay is less than the least the seller will accept. There is no “overlap” of acceptable outcomes. Each party’s BATNA (best alternative to a negotiated agreement) provides a better result than reaching agreement.

One or both parties will have to adjust or compromise their view for this to be resolved. Otherwise, a deal cannot be agreed upon. 

Negative bargaining zone is one of the Zone of Possible Agreement (ZOPA) options in which two or more parties can find common ground. Essentially, a negative bargaining zone occurs when the parties cannot reach a zone of possible agreement.