I believe your shop is going buy looks. Meaning which ones appear closer to the wild caught, therefore price may be slightly higher, i.e. markings, head shape, less frog eyes, potential CB type defects, etc...
Since, most Endlis are obtained at small sizes. Here are few examples out of many captive bred types. Some have very little patterns, or markings that are sideways rather than vertical. In short, ' Price (Beauty) lies in the eyes of the beholder '
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