The snakes are obviously stolen.....

The guy didn't even know what morphs he had, much less their value.

My local shop has a few obvious stolen snakes brought in the store every week with someone trying to get anything for them. He plays dumb and asks them what kind it is and how old it is. These idiots are always wrong, and he NEVER buys stolen snakes.

Buying them only causes the cycle to continue. If you give a theif even $100 for something with a street value of $1K, he will surely go out and try to steal more if he thinks he can unload them easily.

The right thing to do is just say "no thanks" and stop the cycle. If he can't unload them, he won't steal more....