Yes, I guess so.
It's a lot of playmo, but it's been made a lot, and it's second, third (or more) hand playmo the older ones.
I have never come across fake playmobil (yet). I'm not a great buyer (I, myself, only buy brand new stuff ...), but, until now, and until something shows otherwise, I think I can see only original playmo. It's possible, however, to distinguish European playmo, Troll (Brasilian), and the Argentinian (don't remember the maker) kinds. These three kinds are different, even the Troll and the original German klickys from the 1970s-80s (you can see that the hand of the German one is a little more well manufactured than those by Troll.
To make fake playmo, however, musn't be so difficult. In a way, Troll wasn't great quality ... (On the contrary ...)
A few thoughts ...
Gus