Not sure if it was before or after this article was originally published, but Lego now has the habit of rereleasing sets if the secondhand price gets too high.

Not sure if it was before or after this article was originally published, but Lego now has the habit of rereleasing sets if the secondhand price gets too high. It might still be a good investment, but you'd better sell if anything you have increases too much. As you know, pigs get fat while hogs get slaughtered.