PC gaming community is dynamic and innovative. While the hardware may be updated on console gaming, the community isn't involved or industrious enough to stay ahead of pc gaming. The community and the ability to be involved in game development is what is so great about pc gaming. As well as customization, free multiplayer, controls, and the fact that every game out there runs on pc.
And not as many buyers means prices will go down. When a business notices that no one is buying their product anymore, they don't up the prices to make more money, that will just lose them more money. Supply and demand dood. The reason for the increase in prices of some hardware would probably be more accurately attributed to the cost of materials in the global market.
For instance, China controls the supply of neodymium (a much stronger magnetic material). They price control this commodity with extremely shady national business practices (they are a monopoly), which has forced speaker manufacturers to switch back to using the less expensive magnets. This requires them to use much larger magnets in their speakers and still end up paying more than they would have. Also makes it harder to make some higher end speakers.