It's not only the used audio market that could collapse...but if it does, it's likely to be temporary, and it's likely to recover.
The recovery is usually triggered by an increase in spending as those with capital seek to take advantage of lowered prices and others suffering and misfortune.
Such is the economics of market forces, and the laws of supply and demand.
Economics seems to be so ridiculously complicated with an almost limitless list of variables that hardly anyone seems to understand it.
Let alone make reliable predictions regarding the future.
Most of us can only look at historical patterns and try to make a vague sense of it.
2008 was a big moment for the entire western world.
Anyway, so far, so good - John Maynard Keynes has been the man.
Possibly the only one.