It could be real because you can get a set(listed grit) of full size shapton pro retail for ~$475. With careful cutting, can yield up to 9 EP pieces per stone. Even for a poor material sourcing $480 (+$5 for an aluminum bar) investment, added a little of work, getting $700-1300 tax free profit isn't bad. With a volume purchase directly from mfg, each set of full size stone (or even larger format) should cost less than $200. Whose are target consumers for this EP stone set anyway? Sharpening knuts, right. It would be silly to ruin a long term profit making machine by selling fake stones. Well, it's your $, so be wise.