Not sure about that one mate. Bothers me she can't even spell the name of her hometown properly, 'Seoul,' even if it is just a typo? And £100 is very, very cheap. Sure someone can run a GRIS on the pic as well. I'm married to a half Korean/Brazilian and can't say she looks particularly from that part of the world.
Would love to be wrong though!
FYI, if you're after a Korean;https://www.adultwork.com/1647023
I've never actually seen her, but have her on my hotlist should I happen to come into some extra cash!