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Yes!
1. There is a Russian and Central Asian supermarket near DDP. They sell very cheap bread, foreign spices, and alcohol. It is called Imperial Foods. Here is the address: 서울 중구 을지로44길 13 1층
2. There is an American supermarket in Seodaemun. There is a grocery store that sells a few cheap American products, but there is also an area in the building outside the grocery store that sells every American product you can imagine. It is expensive though, so keep that in mind. The name of the place is Sairuga. Here is the address: 서울 서대문구 연희맛로 23
3. There is a Philipino street market that is held every Sunday afternoon near Hyehwa. It normally opens at around 1 PM. You can find fresh-made Philipino food, grocery items, and SE Asian vegetables. This is the address: 서울 종로구 대학로 156 동성100주년기념관 내 혜화아트센터
