Some companies are slow to recognize when they should adjust prices. Some possible scenarios:
- Put off price increases for some time and by the time they did it...years of inflation were factored into the updated price.
- Raw material + supplier price increases to keep the desired output quality.
- The desire to market and sell a product at a price point that the AVERAGE diver wouldn't view it as being disposable and/or junk.
If they still sold regulators today for the prices they did years ago...a lot of people would buy them, use them until they don't work well, and either flip them for a few bucks or toss them in the trash.
That and a lot of people wouldn't even consider them, because they'd see the price and assume they were junk.