I don't know if this has ever been discussed but how about some basic rules for the buy and sell? like mileage, status (clean/rebuilt), price.
I know the argument is that interested parties are going to ask the questions anyways. I am looking for a bike now and personally hate having to ask these questions. If everything was listed, a meeting time to see the bike can be arranged sooner.
I would tend to agree - but as it's not a paid system, it's up to a seller to try and sell his or her product.