Despite 20 years of experience shopping at the Tucson Gem & Mineral Show, Vivien discovers new Peridot material and makes a classic error — buying “retail” instead of wholesale. It is easy to make this mistake, especially when the material in question is a “new find.”  One has no idea whether one will see the same material elsewhere, and at what price, or whether it is a unique opportunity. On the other hand, as this video clip shows, there are other cues to alert one that perhaps the price is “not so right.” To build your confidence, it is a good idea to listen and watch, as the vendor interacts with various customers, to get a feel for the vendor’s style. But probably, the best guideline of all is this: If the price isn’t displayed for all to see, proceed with caution.