Thanks for telling that the phenomenon is more widespread than the two creatures found by Tiersammler.
Still, I find it very peculiar: why not simply block parts from licensed sets from the DS repertoire, instead of charging such absurd prices? We all know and accept that lots of non-licensed parts are off-limits (figures, but also more), so why not go about in that way?
Charging 1,000 € for a toy horse is not only poor taste, but might have legal implications too: one could argue that they abuse their position of dominant firm by charging unfair prices.
Best wishes
StJohn