I fix old electronics things like phonos, radios, and other sound related things as a hobby and resell(mostly 60s through 90s). Ebay is still great (well "good") for old parts and selling my warez. Although I do sell more locally as I've gotten some word of mouth, and it's more business than I can do with my day job. Anyway ebay still works for older products/parts for electronics and I reckon other fixable things.
They're still sometimes useful for old parts and the like. But there was a period when I used them all the time--admittedly as something of a novelty. Now, it's maybe a once a year sort of thing. Global supply chains have made a lot of the used market pretty tough for things you can just buy new. (I admittedly work a lot harder to get rid of stuff than acquire it these days.)
