Trip to Seoul Korea...What is cheap there?

Hey guys,

I'm taking a trip to Seoul, Korea, and although Ive heard that it is quite expensive..Is there genuinely anything that would be worth buying there to sell that Korea produces or has that is cheaper than elsewhere?

Just looking to maybe make a little money back on what i'm going to spend on the trip!

For example are I-phones / I-Pads cheap in Korea compared to other parts of Asia?

Any ideas welcome! (apart from the obvious highly illegal ones!)

Thanks!

Electronic items are slightly cheaper than in Europe, but probably not much cheaper than in the rest Asia.