When you invest in a computer or home theater system, you want to make sure you're getting the best quality equipment. That means buying expensive components and A/V cables, right?
Not necessarily. In fact, those $100 media cables with the gold-plated connectors aren't going to do anything that a more reasonably priced set of cables can't do. Cheaper cables will conduct electrons every bit as easily and efficiently as more expensive wires.
Now if you're in the market for batteries, it does pay to do a little research. Brand-name batteries tend to last longer than batteries that have a low price point. The sweet spot, as far as value for your money is concerned, is somewhere in the middle. For example, store brand Kirkland Signature batteries (90 cents/pair) performed as well as name brand Panasonic Digital Power batteries ($2.84/pair).