Score the selling agent 1–5 on each dimension — Weak (1–2) → Average (3) → Elite (4–5). The first three pillars judge their selling craft the way their own vendor would judge it, because that is the true measure of how hard they will be to negotiate against. The last two judge their conduct toward you in the transaction. Five weighted pillars produce a capability score out of 100 and a tier that feeds the Strategy Calculator and the Buyers Roadmap. Throughout, “the vendor” means the agent’s client, not you. Every dimension also carries a vendor read: what the observed behaviour tells you about the vendor standing behind the agent.