I’m not sure this is limited to second hand instruments more of a fundamental restructuring of the global economy. Inflation was being artificially reported and central banks have been in denial for a decade. A 1970’s style inflationary spike was inevitable before Covid and now thanks to Putin it will be turbo charged. Bit off topic sorry. The good news is that there are a lot of great instruments at reasonable prices out there. Personally I’ve never been attracted to “new” for the sake of it. If I can buy a well loved instrument locally that has been well set up and has better pickups and hardware than it left the factory with it is more appealing than waiting months for arrival, messing about waiting for couriers etc.