A .22 can that you pay $200 dealer cost for can easily sell for $300. Profits on guns are typically in the 20-25 percent range. Cans can sell in the 40 to 50 percent range depending on local competition. If you are the only SOT in the area, you can can charge more and levy a hefty NFA transfer fee to discourage ordering by the customer and shipping to you. If you can afford to keep a decent selection on hand you'll do better as well. You see, they might save $100 ordering it and having it shipped to you to transfer, even after the transfer fee, but if you have the can on hand you can save them a couple months on the process by avoiding the Form 3 transfer from dealer to dealer. That alone people are willing to pay a premium for. Plus, if they can put their hands on the can in your inventory, the impulse purchase factor increases exponentially.