A "classified" section exists on many other forums and I would have no objection to a classified section on this Forum but I would prefer it to be a dedicated section, not ad-hoc "For Sale" notices on varied Topics.
It works well elswhere, best example I know being the Land Rover Forums where such a classified section provides an excellent "meeting point" for buyers and sellers.
Could be better than the Free Adds where I had some very unsavoury characters turn up whenever I have advertised things, and a better alternative than the paid adverts that for me at least produce very little responce apart from the Dutch Money Scam artists.