Correct: I'm in Gimpo, but it's not far from Seoul. Kind of like the Seoul metro area or a suburb. I can get to Seoul by public transportation (subway/bus) within an hour. And the fare is only $2-3.

And I was a little fast and loose with the KRW-USD conversion. I opted for the simple 1USD == 1000KRW, so the actual numbers are a little higher.