Basically just the CPU fan, case, and PSU (if you're lucky). If someone can figure out how to get Doom running on just those 3 things, young people will be able to ascend.
It cost me nothing because I did not need to buy a new one each time.
So what should a cooler in this category should have Costed in 2015 for you?
You keep rambling about premium but do not define what that means for you.