‘Common’ items are almost never overpriced in the sense that someone somewhere is making outrageous profits from high prices.
Things that are overpriced tend to be thinly sourced, have small markets, OR have some kind of monopoly pricing power.
I built a device a while back that I was thinking of having manufactured. It had about $10 in parts in it. But manufacturing means setting up tooling, buying parts in bulk which costs up-front money, making instructions and packaging, storing inventory, hiring all kinds of people along the way for various things.
A company in China offered to make the thing for around $30/copy. For that, they did everything including the packaging. But the minimum quantity they would make was around 500 for that price, so I’d have to cough up $15,000 and then figure out how to sell them all. And if demand skyrocketed and I had to make 5,000, there would be big delays and the per-copy price would be too high. So big risk.
Another company offered the full deal - make the product, sell it to an Amazon reseller who would put in the marketplace, etc. I would get roughly $10 for each product, which they would sell to the reseller for $70. I was basically selling my idea only for royalties.
The reseller who buys the items for $70 will then put them in the Amazon marketplace for maybe $120 or so. But they have to handle all the transactions, eat the refunds, put up the money for inventory, swallow the inventory if it turns out there is no demand, pay Amazon its cut, etc.
Nobody in the mix was likely getting more than $10 profit on each sale, but it still resulted in a $10 item (parts only) selling for $120. I didn’t see anything unreasonable about the pricing at any step of the process.
Drugs are expensive for a simple reason: it can take a decade or longer and a billion dollars to get a drug through the FDA trial process and certified for market. And for every successful drug there are other on which hundreds of millions are spent and never recovered because the drug trial failed.
So the drug company has to recoup not just the R&D for the successful drug, but make back the money on the failed ones. To do that, they have a 17 year patent window, after which generics flood the market and crash the price. So if you think you’ll sell a million pills in that 17 years (say, a pill for a rare condition), you might have to sell them for $1,000 each just to break even, even though the marginal cost of manufacturing may only be $1/pill. If you can’t sell them for that much, you simply won’t do the research in the first olace.
If you want to lower the cost of drugs, there are two ways: Lower the cost of development by easing regulations, or increase the patent protection lifetime. The drug companies are not getting rich. Their profits are higher than most industries
at times, but not by that much and that higher profit is because of the incredible risks they run investing billions in products which may never get to market. Risk carries a price, because if it didn’t no one would take risks.