I agree, my point wasn't that people could make money, it was more of the fact that you wouldn't lose money! until around 2013-2014 virtually no 1/6 scale would go down in value, when they sold for $120-$180 and were more limited production runs.
So you could take chance and buy lots of figures knowing if you had to sell them you would get your money back (or even come out on top). Now that is not the case, in most circumstances you will lose money if you pay within 10% of MSRP, much bigger risk involved. More than ever its now a "buy only what you must have" hobby.