All you have to do is go to the ATF website. They have all the info you could ask for...Class 1 is $200 for 3 years...Class 3 is $30 for 3 years and is only to "acquire" firearms classified as "curios" and "relics". It's purpose is to facilitate a personal collection. You may NOT engage in the business of buying and selling curios and relics under this license. That info is right off of an application. The way I understand it , if you have the class 3 license, you are able to buy NFA weapons without paying the $200 bucks each time, and entitles you to the FFL prices. You just can't conduct business with it...for that you would ALSO need a class 1. If my understanding is incorrect, please correct me .