The general grocery stores sell a butane gas cans for 3,000 won per four can pack. Most places charge more than 4,000 won for a four can pack. They also sell butter at the cheapest prices. I bought a 450 gram packet of Seoul Milk Butter for 7,000 won. The owner told me that prices were just raised, so it will cost more next time.
Butane Gas Canister 4-Pack
Butter (middle shelf)
The market is also the best place to buy fruits and vegetables, but you should shop around for the best buys and stores. Most places do not accept credit cards. Some do and charge 10% extra. Some of the larger stores accept credit cards without extra charges. The stores wholesale, and also retail on the side. If they do not accept credit cards, they can cut out the VAT, credit card processing fee, and reduce margins.
I bought a box of 16 apples (medium size, much bigger than at Home Plus, Emart and other stores) for 15,000 won from this store.
At the west end of the market, there are stores that sell meat, mushrooms, ginseng, nuts, seeds, grains and other foodstuffs at prices much cheaper than discount stores.
I also bought a 10 kilogram box of sweet potatoes nearby for 20,000 won. Really good quality.
Some stores are great, some are rip offs. So, shop around.
