Korea - Korean Travel Agencies? ..

Does anyone know a good reputable travel agency? I and the family are traveling to Korea and the Philippines, and would like to find a good Travel Agency. My parents always use a Korean travel agency, and they usually say its cheaper, since they usually fly Korean Air or Singapore Air. But I don't know much about that and I would guess that it won't matter what travel agency we use? We mainly want to fly Korean Air if possible, since the times work out for us for our itinerary.

We had planned on buying our tickets today, but the travel agency somehow "misquoted" us the price for our tickets and are now quoting us $200-$300 more per ticket. (We put in our reservation for those tickets when we were quoted them so we could get them at that price). So now I am wanting to look around to check other travel agencies.

Have you checked the price to just buy the tickets directly on the Korean Air website?

I just might. but usually, going through the travel agency was always cheaper, which is why parents always used a travel agency.