While this may seem like a good idea you will never get agreement among hobbyists. Some are purist but many like snakes that are "different". Unique animals, even if not genetic, typically go for a premium. What about a paradox? Or a ringer? They wouldn't fit a standard but the demand is huge for such snakes. I know this cinnamon champagne wouldn't fit a standard but I bet if I put her up for sale I'd get more for her not less.
A snake that is "slightly different" that's being sold for more money may not be a seller trying to pull off a fast one. I've always looked for BPs that were slightly different, or very different, and it's often paid off for me. I once bought a super mojave that just looked different to me. After talking with the seller a very well known breeder at the next table told me he's seen super mojaves that looked similar and he didn't think she was special. I bought her anyway as I wanted to produce crystals and I thought she had a neat look. I'm glad I liked her as she hatched this in her first clutch...
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