u mean they dont sell tt in kr?
it's oni meant to be GWP?
GWP = gift with purchase
the essential range is 3 for $10 here
oni the hyaluronic acid one is good

but many ppl buy pearl.
many shops (esp the ones in Seoul) actually give it straight to
you without you even needing to make a
purchase...
you just walk into the shop, the salesgirl will give you a
basket with some free goodies inside for you to keep. whether you
later make a purchase is up to you but you can keep the free
goodies. here in wonju (i bought TFS in chuncheon, btw) they give
it out when you make a purchase, but it is those smaller outlets
here.
they dun sell these... in korea we call his "seub-bi-seo" aka
extra service...
i mean, of course they do, but why bother buying when you can ask
the counter girl for more of these for free?
and yes the face shop i went in seoul jongno-3ga gave the
hyaluronic acid ones for free.
didn't collect them though as i couldn't be bothered then at
that time to walk into the shop...
other seub-bi-seo products for free include stuff like lip balm,
lip stick, eyeliner stick and facial cream / toner~