I think spending on audio is softening. Many guys are buying this gear without sharing real costs, and when important things start costing more and the portfolio is shakey, those 4 year old speakers start sounding better.
Like all other markets audio ebbs and flows. I remember you could hardly find anything worthwhile on the used market during covid. I sold a few items at top dollar. Once the gates opened people started churning, now the market if flooded. There are only a few brands to my knowledge with significant wait times, so if you are selling one of those you are good.