Does anyone know anything about these snakes?

I found this set of snakes for sale, the seller says that they are a hard material like resin. I don’t know if there are any markings on them. Does anyone know where they came from/what species they represent? Any information is helpful in my decision on wether or not to buy them.
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Never seen them, but they look like small resin figures sold in gift shops. The same sculpts were clearly used more than once. Some might be attributable to actual species, but some might be made-up. Kind of like the Steal Street butterflies I have reviewed.

Neat models

But resin isn't so much much my cup of tea

Never seen before

I put resin figure like this in my garden