ETA used to make movements in asia so it may still be an ETA but maide in asia, that should be the same as a swiss one as it is all the same firm with the same quality control, but when buying any movement on the bay, or from any where for that matter the questions should be,
Is it new?
How long has it sat on a shelf for?
Is it a standard movement?
I have bought movements on the bay (cheep) but they needed a service and in one case it came with the shortest canon pin, seconds wheel and hour wheel i have ever seen!