This is a difficult thing to work out due to the many different opinions people have on the subject.

Perhaps there could be a system where a bedroom trader puts in £80 + Vat and is then allowed 6 ads a year, they can all be used as and when they like but once they are gone that's it. If they then want to put up more ads they will have to pay the difference to top up to full trader status.

I also think there should be a bedroom trader avatar made specifically for these guys, and a regular trader one as exists now. That helps the uninitiated see who's who. Add a room for feedback where everytime a bedroom trader joins, the mods add a new thread entitled that person's username. People who have had dealings are then allowed to leave a one line reply stating their take on the transaction. There would be a mod for this room who would keep it under control and keep out squabbling. Anyone ignoring this rule would be warned and then banned.

That's my 2p.