One gets a C & R license to be able to act as a "collector" of "Curios and Relics" and be able to ship and receive C & R classified guns directly through the mail or other common carrier (UPS, FedEx) WITHOUT having to pay an FFL holder to receive the gun for you. A "Collector of C & R" guns cannot be in the "business" of buying and selling. They do permit selling occasional guns from your collection, but there can be no "dealing" in firearms with the intention of profit. A C & R licensee cannot buy directly any gun built after the cut off of the C & R period, which is expanding as time is on-going. In order to buy "modern" guns we have to go through a "dealer" just like you. BTW, all these old double barelled shotguns that are at least 50 years old that we all love, and you are able to demonstrate that they are over 50 yers old, are eligible. They DO NOT have to be particularly listed in the booklet, just have to be over 50.