29/01/2016
To tell the conclusion first, it is impossible to book a express bus through internet as a foreigner.
Korea has weird and stupid internet payment system.
You must have Korean ID number most of time to pay with your credit or debit card.
The expess bus booking system staff said that it is possible to buy or book a bus ticket at bus terminals in Korea with foreign cards, however it is not available through internet web site.
Of course bus is cheapest transportation to travel between cities. If you really want to book a express bus, you should go to bus terminals or ask staff at your accomodation - especially hostel owners.
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