ShinHan Touch Twin Markers are the cheapest professional markers you can find here in Korea. Most likely because they are made here. They come in a vast assortment of colors. You can buy various sized pre-arranged packs of colors. But everyone knows that the real fun is in picking out your own colors. If you don't know much about different colors, it's fun to just pick ones with names that you can easily learn. For example, pick food related colors: potato brown, lemon yellow, mint green, ice blue, fruit pink, chocolate. 
They have two sides: one fine and the other broad. 
These markers can often be spotted on the desks of Korean animation people. Storyboarder, Park Min uses bold colors in his storyboard work. He also uses them in his personal sketchbook. Here is a wonderful example borrowed from his blog. You can easily find these markers in art supply or stationery stores in Korea. You can also find them at the Shinhan Art website. Have you ever tried this marker out? What do you think?
By the way, there is actually a cheaper brand. Alpha Plus Twin Markers (pictured above) are an even older and cheaper Korean brand of markers you can find straggling around art stores sometimes. Unfortunately, their poorly designed caps can easily damage the marker tips. Too bad!
