No, but since I'm korean and I had friends there we went to cheaper places haha. No need to fine-dine there, IMO anyway. I bought most of the meals too :P
If you visit any of the "tourist attractions" they are usually littered with souvenir type stuff. Insadong also caters mainly to tourists and therefore carry such things.
Some things I guess can include things like tea, or little ornaments. I gave out these fancy looking chopstick things I bought at Insadong (It was like $5 for a pack) and everyone loved it. Or at least they pretended to
