I would say that, for my part of France at least, there always has been some stuff that was way over-priced and some stuff that was "I don't know what it's worth, take it away" level. What seems to be happening now, if I look at Le Bon Coin for example, there is a lot less of the really cheap good stuff, junk is being way over-priced and probably not selling and what is left is expensive enough to depress the enthusiasm of the buyers to the point that they are simply not buying at all. No point in putting collector's prices on good but not collectable items, which is what seems to be happening. (The extreme being the number of Instamatics and similar that the sellers consider "collector"!)