You're wrong. Demand is still very high. Most people building high end rigs aren't counting pennies or worried about the next thing because they are going to upgrade again next year.
AMD can't make chips fast enough. Demand is not down.
You missed what I was saying. Those enthusiasts "building high-end rigs" are likely to know about next month's Rocket Lake launch, and don't want to potentially be stuck with something that isn't top of the line just weeks after they buy it. And there are only so many people willing to pay those kinds of prices before that market is saturated. If someone was willing to pay a big premium for one of these processors, they would have most likely done so already.
As the charts in the article illustrate, not only are the selling prices of these processors dropping, but so are the number of completed sales from third-party sellers. That should clearly be indicative of reduced demand, or at least, reduced demand at marked-up prices.
Going by the charts, the 5800X and 5600X are both averaging just $50 (10-20%) over MSRP now, and after deducting transaction and shipping fees, along with the sales tax paid on the initial purchase, leave no room for profits by someone buying them at MSRP to resell. Anyone buying those processors to resell at this point will likely end up losing money on them. Someone without an eBay store will be paying them around 10% of the sale price (or around 4% for a store listing), plus another 3% to paypal, adding up to around 13%. Add sales tax paid on the initial purchase, plus the cost of shipping it out to someone, and a regular reseller would need to sell these processors for 20-25% over MSRP just to break even, or perhaps more in a state with high sales tax. At best, those who bought these chips to resell are just trying to cut their losses at this point.
And the reason AMD "can't make chips fast enough" is more down to the high demand for graphics cards at the moment due to mining, along with their obligation to produce millions of APUs for the new consoles, all of which use large, monolithic chips built on the same 7nm process as their CPU chiplets. They have limited manufacturing capacity through TSMC, and are required to dedicate a big chunk of that to console chips, despite those probably not making them nearly as much money on a per-wafer basis.