I never said getting a cuttlefish would be easy. . . Part one of this four part article described the relationship between cuttlefish and life, the universe, and everything. Briefly, cuttlefish are related to octopuses and squid and distantly related to clams, snails, oysters, nudibranchs and other mollusks.
Cuttlefish are intelligent and make fascinating pets for advanced aquarists.
This instalment covers methods of cuttlefish acquisition. If there is a good marine store near you that has cuttlefish for sale or is willing to order them, that is by far the easiest way to acquire a pet cephalopod. Some pet stores will not be willing to order a cuttlefish because of the risk of inking in transit. Cephalopods don't ship well, especially if those who send them don't know what they are doing. If they get startled, say when their box is thrown onto a truck, drop kicked off the airline's loading cart, punted across the tarmac, etc.