blown head gasket

i found out that my head gasket is leaking, i have small drips of oil that can be noticed after parking on my driveway overnight. how much would it cost to replace the gasket? should i take it to a person expiereinced with VWs? or it just one of those things that are the same method for all cars(oilchange radiator flush etc.?) i would like to get this fixed before i find coolant in my oil pan, i have heard thats what it leads to? thanks V-Dubbers in advance.