Most negotiation training assumes a competitive situation: several capable suppliers, time to run a process, a credible alternative. A great deal of real procurement happens in the opposite conditions.
Separate price from everything else
When price is genuinely immovable, the negotiation is not over. Payment terms, minimum order quantities, lead-time commitments, forecast obligations, liability caps and price-review mechanisms all carry real value and are frequently more negotiable than the unit rate, because they cost the supplier less to concede.
Understand what the supplier is optimising for
A sales team under a volume target behaves differently from one under a margin target, and both behave differently at quarter end. None of that is secret; most of it can be inferred from how they have behaved before. Aligning your ask with what they need makes agreement cheaper for them.
Build leverage for next time
The reason you have no alternative today is usually a decision made eighteen months ago — a specification written around one supplier’s product, a qualification never completed. Weak positions are inherited. The work that fixes them is done well before the negotiation, and it is the work most consistently deferred.
Be honest about walking away
A threat you cannot execute is worse than no threat, because it teaches the other side what your words are worth. If there is no alternative, the productive conversation is about the relationship over time, not about a bluff both parties can see through.