Yup, and the description of one said, "This is an authentic Escher Barber's Delight with box. The box is not mint, but it's in good condition", which is slightly weasel words to me...box is BD, but the stone? Meh? Who knows...no provenance, so no buy.
The Fox 44 stone I have is the only stone, not branded Escher, that is clearly an absolutely similar stone, both in texture, *age*, and results...and still to call is an Escher Barber's Delight would be incorrect.