none > think some of these appliances should be 50 bucks everything is overpriced. I think a Jewish company should open and sell things by the actual price it should be or make quality products for same price
Gemorah already did this experiment: chachomim davened for Hashem to take yetzer harah away. Next day, nobody went to work, nobody got married, and even hens stopped laying eggs…
Most of these products are available from multiple companies. Is there fair competition? If there is, you can be sure you are getting good price. Otherwise, there will be a company with lower price. If the company is public, then you can read about their profit margins. You can also open your own company and sell things for cheaper. If you don’t have money, you can borrow from investors who will jump to get extra profit. This is how it works. So, rest assured that savings from using tighter specs are going to benefit you.
The main reason for overpricing would be lack of competition, such as government regulations (that is necessary in defense industry but rarely in others) and business constrains, such as cost of laying cable for the whole string leading to one dominant cable company. This can be sometimes remedied. For example, long-distance calls and phones themselves were part of AT&T monopoly – until they were separated by regulation.