용산전자상가 (Yongsan Jeonja Sangga) is where you should go in Seoul to shop for electronics. I’m a gadgets person (I just don’t have the means to have them) and I like going to Yongsan from time to time just to see the latest gizmo in the market. There are more than twenty buildings in the area where you can find anything electronics from light bulbs to speaker mount, latest cellphone to computers and of course, home theatres!
Yongsan is Korea’s answer to the more popular Japanese district of Akihabara. It is accessible by subway or bus from anywhere in the city and is near the tourist district of Itaewon.