Question: a must to buy in korea?
Answer: Hallyu paraphernalia. If you've fallen victim to K-pop (or K-drama) fever, there's no better place to rack up on Hallyu paraphernalia than South Korea. ... 
Quirky Korean socks. ... 
Unique kitchenware. ... 
K-beauty products. ... 
Korean paper products. ... 
Ginseng. ... 
Cute stationery. ... 
Tea.