The keystone is the supporting element upon which all other interrelated things depend. In architecture, it is the wedge- shaped stone at the highest point of an arch that locks the others in place. Just as the keystone in an arch is the key to everything else, so is the "keystone" in a selling situation.
The keystone in a selling situation is the primary benefit the buyer is looking for. It is the deciding factor in a purchasing decision and could be one, or a combination, of a countless number of things, such as:
Identifying the keystone in a selling situation is much tougher than simply locating an architectural keystone, which is obvious. In a selling situation, if you assume what the keystone is, you will likely make a serious mistake, one that has cost an untold number of otherwise professional salespeople more sales than they can imagine. Until you ask, you really don't know what the buyer will base his decision on.
Discovery is the Heart of the Sale. Decision makers expect salespeople to have the gift of gab and to talk, often at length, about their products and services. Many are conditioned to disregard much of a sales presentation. Fortunately, however...
Most people are conditioned to answer questions, so ask open-end questions. Probe the choice points, and stay in Discovery until you identify the primary benefit your prospect is looking for, the one that the buying decision will turn on.
Here are some good techniques for asking questions that keep your buyer involved in the sales process and get results:
Focus on what's in it for your customer and try not to think
about your own self-interest while talking with your prospect.
Remember that the customer is depending on you to be his advocate
and keep his best interests in mind. These three tips will help
you outdistance your competition and develop a stronger sense of
trust and confidence with your prospect:
Keep asking until you find the keystone, the one question
at the heart of it all. Then you can start working your
way back out again. That's when you start finding answers.
Alex Cross, "Mary, Mary"
by James Patterson