3 of them had their registration date reset, 1 without reset on a godaddy auction. People often say domain prices are rising and you can’t find anything—in about half an hour, I placed backorders on domains and went through all the interesting lots. You can’t find them like this every day, but it happens. If you spend a month, I think it’s realistic to register several dozen domains at $20–$40 each. Multiply that by a year, and you get a PBN network at the cheapest market price. That’s a competitive advantage right there)
Buying a $25 domain with backlink profile and history is better than starting from scratch.
So I think it’s one of those myths that prices are rising year after year. Depends on what)
P.S. All domains are indexed.