Buying a CPU can be a tough task if you do not know how to go about it or have a tech experience. The video explains in detail how to purchase a video. I learn that it is always good to have a budget and to make a right depending on the performance per dollar spend but buying a CPU, you must consider the hardware that will carry the CPU. That is price of the CPU, and the hardware should be considered to know the value of the CPU. Buy the CPU and its accompanying hardware brand new without looking at the used market due to the availability and pricing and the CPU cost should not be more than 50% of the budget for the system. Purchasing a CPU should depend on the purpose of the system that is gaming, workstation and allrounder. Since I am not a gamer, I will focus on a $1000 workstation, because of availability and performance, the Core i7 8700k and Ryzen 7 2700x will fit well for my budget since GPU, memory, motherboard, storage and cooler should be considered in the budget. Core i...