Like most other Korean websites, online shopping in Korea requires a bunch of ActiveX plugins and Internet Explorer.

Coupang - does not require Internet Explorer. Works well with Google Chrome. Paying by card does require an ActiveX plugin. ActiveX plugins can be skipped by bank transfer to a Coupang account number (this account number changes with every order), or by setting up your bank book or bank card number with their Rocket Pay payment system. Items that qualify for Rocket Shipping will ship the next day. They deliver every day, except for major public holidays. The order deadline for next-day delivery is midnight.

Gmarket - does not require Internet Explorer. Works well with Google Chrome. Paying by card does require ActiveX plugins, but can be skipped by bank transfer to a Gmarket account number (the account number stays the same for future purchases).

1300k.co.kr - 1300k is a stylized way of writing "Book".  Known for selling diaries/planners, stationery, furniture, and home decorations.