for sale posts?

[beale]

If you were to post a thread of an item for sale,
How do you communicate with a seller - PM
If you get no response what do you do?
If their thread is still for sale what do you do?

I've bought and sold a good few things now on oople and think its the best way to sell, as its from racers to racers. Occasionally I've offered asking price to not even get a response, which is fair enough if the item has gone but at least change the item to sold. PLEASE