I wouldnt trust those translation companies too much. my friend paid 70 dollars to have someone translate a recommendation letter so she could work abroad in a hospital (shes a doctor) and they translated on sentence as "whats more surprising is that she became a doctor". I was shocked. She paid three different companies and all of them had horrible translations. If you want, I can help you. I understand most korean as long as its not a document needed for your visa or anything =) i wont charge you either. and you can have your korean friends check it out too.

I had translated a car manual before.  It was a complete volume of a catalogue with full of photos.  This time somebody asked me to translate a six-page academic thesis to present to an international conference in China this weekend.  I only charge KRW 20K a page for proofreading.  If yours is an easy work to do it could be different, otherwise a single space A4 with no picture gives you a bit of labor work.  I think translation is a creative writing.  That's what it is compared to proofreading.