cmd dont worry about it..end of day there are no rules about who can sell what.. there isnt even a rule about introducing yourself... what the people here are doing is trying to tell you off and giving you a slapped hand for what they believe is bad manners... nice welcome eh?
its so easy to add a post count restriction to sales forum...it hasnt been done for a reason ..
pity i didnt see this before buying a new one though
good luck with it