They won't do anything without proof, but it's always good to have a report made up for records. If someone does report them later, it's already been recorded. Someone could be away on vacation and someone stole the snakes. There was also a story here not too long ago of a drug-addicted roommate or relative (I can't remember) that stole a person's albino and sold it cheap immediately after. The snake was eventually returned to the original owner just by chance.
I agree. Sounds too good to be true. A quick buck. Report it, just to make sure.