Any sort of hardware produced in the last 5 years has at least doubled in price. Some, like RAM are 3-5x more expensive.

So whoever hoarded it in warehouses could sell it now immediately for at least 100% profit.

They seem like geniuses to me now, worst case they make 100% profit on the investment.

It's only RAM, mass storage and GPUs. Desktop CPUs, mainboards, PSUs, and cases have become cheaper because PC building demand has declined. Peripheral prices have remained largely unchanged.