Electronics as a hobby has been on life support for ~40 years. It received a HUGE boost from the Arduino, maker culture and related stuff but it's still kind of a niche thing. That said, test equipment on ebay still gets bid well beyond what it would have cost just 4-5 years ago so clearly *someone* is still buying this stuff. It's not just sky high asking prices, though there is a lot of that, actual bids go pretty high on a lot of gear. Hard to even find an old analog scope for under $100 or so.