For the cooler alone? Anywhere between 50-70 aud. The current cpu is a LGA 1150 socket I’ll probably just repurpose the current AIO. Especially since new cpu, ram, ssd and mobo is about $800 currently.
I have already built a new pc just refreshing the old one for my brother. It’s still using the first ssd hdd and ddr3 ram I bought about 8-10 years ago