Can you guarantee that any animal you sell someone will not be used to make a Hybrid? For that matter do you have documents and genetic tests that prove "every" snake in your collection is a pure example of its breed? For that you would have to go all the way back to the wild caught parents and some how test their genetic sequencing against what science has classified as a genetically correct, for the example we will use, ball python strand. From their any morph would have differences that could potentially rule it out as a pure ball python. I hate to tell you this, but Hybrids are born in the wild more often than science would like to admit. Look at the Grizzly bear / Polar Bear hybrid that was found a couple years ago. Then once things become pets they even become more Hybridized, look at Fido the pet dog.
Micro chipping only goes for those owners capable of testing for the Micro chip. Last time I checked the readers cost some money.