Regardless, I would only lock the thread if requested to do so by the original author. In the case above, this item was not even advertised here, Shaun merely brought it to our attention as he had seen it advertised elsewhere, so there would hardly have been any further discussion here.
Anyway, point taken. If requested to do so, then so be it. If not, feel free to add further comments to a particular thread.
-F_D