Coins & stamps

Hi, I have a bunch of about 300 old coins and 120+ stamps (my grandpa, father and my own collection) that I want to sell off (approximate value would be in the range of 6000 and 2800 usd respectively) for around 4000 and 2000 usd. I want to sell these as the unbroken sets. Does anyone know the best way(s) to do this ???