Reptile skins, especially snake skins are highly valued for making leather items, like leather bags. Snakes will periodically shed their skin as they grow bigger through a process called moulting. Some times reptiles are getting caught in the trap laid for other animals like rats.
In India, cobras are venomous, yet are worshipped during the Nag Panchami festival. In some snakes,the venom is removed, so that they do not pose a threat even if they bite them.
The snake farm of Romulus Whitaker is famous for breeding snakes, for their venom, which is an antidote for snake bite.