Actually, not a bad idea TBH.
I remember getting over excited when I first joined and bidded for a ton on M2Ms, only to be disheartened when I was (politely) turned down.
Never quite understood it at the time but now completely get why.
MODS....Perhaps after registering, sending out as a PM/email the rules and also a guide to selling and buying?
I know that would have certainly helped me back then.