1daytrip to greenland

i will spend 3 weeks in august in iceland and i think about to do a 1day trip to greenland. does anyone know about the price and recommend a special agency?
thanks a lot

http://www.airiceland.is/AirIceland/Destinations/Kulusuk/
B-)

thanks.
this means, that it isn´t necessary to book over an agency?

Why should it be? you fly to a small village (Kulusuk) next to an airport -see the village, buy a souvenir and fly back to Reykjavik - and - after having paid a lot -you can make a tick on yout countrylist.