It can be argued that it's a stupid regulation but the law says that anyone selling modern airguns 'by way of trade' needs to be a RFD. I see a couple of guys quite often at antique / fleamarket locations who are clearly ignoring the law and claim to be collectors disposing of surplus items. If people keep doing this it will not go un-noticed and will not do any good for any of us. If they lose their stock, they have only themselves to blame.