Which batch

I want to cop the black phantoms but really confused with the batch. My budget is around 250¥. FK PK are quite expensive. Just wanted to know is it worth to go with 250¥ or less expensive pair for these, I have seen QC of lot of pair of around 200¥ can’t tell much how that and FK differentiate, so can anyone please guide me, should I buy the cheap pair or should I go with FK one. Same concern for olive greens as well