Price is a simple number. How much money do I need to hand you to get this thing?
Cost is more relevant, more real and more complicated.
Cost is what I had to give up to get this. Cost is how much to feed it, take care of it, maintain it and troubleshoot it. Cost is my lack of focus and my cost of storage. Cost is the externalities, the effluent, the side effects.
Just about every time, cost matters more than price, and shopping for price is a trap.