The owner of a board is the Dictator thereof. They (Lee in this case) may set whatever rules he wishes ( or arbitrarily ban anyone for any reason or no reason). The owner may decide the tenor and theme of their board. Or in this instance , Lee may decide if he wants a discussion board for T all the listed goals) involving S&W , be primarily a wholesale resource for dealers , or sonmthing inbetween.
Presuming it is somthing inbetween , but leaning to the former , there are a cpl of commonly used steps.
Have a minimum post count to be able to enter the classifieds ( enter the sub forum). 50 seems common around the 'net for restricted areas, but this board operates at a higher plain than most , so 100 posts wouldn't be out of line.
Have a seperate section, and seperate identifier/ color code/ whatever for Dealer/ Industry/ Partner/ Whatever Paid memberships. Usually on most boards this involves the Pros selling rather than buying , but at the least interested parties could PM them offering to sell , or seeking an offer.
And yes , many people will sell on specialized enthusiest , or locality based generalized enthusiest sites on purpose instead of advertising nationally , or going to auction. The automotive Blue Book lists three price levels for everything : full retail , dealer trade in , and private pary. Many people prefer to buy and sell in the private party based world.
But out of all the possabilities , ending classified for firearms is far from the worst option.
Addmittedly I am a 'puter Luddite , but I do 99% of my forum'ing , and internet generally on an antiquated crackberry. And I can assure you , no Tap whatever is needed to participate , just plain old web access. So yeah deactivating that automated whois on classified wouldn't stop anyone from participating , and bring it back to a level field for live humans.
As to the initial proposal, it sounds great at first, BUT
It would be unenforcable generally, and there are enough semi-pro unlicsened Flippers , and 001 holders who are either basically hobbyists generally , or at least in regards to collectable S&W , that it would achieve the goals anyway.