Maybe there should be a ???buy/sell and wanted??? section separate from the main TYCO page, so that the informative posts stay relevant.Also, instead of making a wiki, there could be a ???sticky??? post that gets edited when necessary.
There could be a "my tyco cars" sticky where members can only post pictures of their tyco collections, for others to enjoy. Members should avoid posting useless comments on such a sticky, or useless comments could be just edited out by an admin.