Longer ago than you think!!
I started using eBay in the first year after it's startup. I decided my knowledge of film camera's could work for me.
It has. I specialized in all those closet camera's and bought like crazy. After a couple of years I started selling.
Business has been good, even brisk at times. Camera's that were higher end and well recognized have paid off for me. Prices are rising. I've supplemented my income, and lately my retirement nicely.
Lenses are selling well at good prices.... particularly those legacy lenses that people are using adaptors to use on Digital (mirrorless).
But for me, so many people are giving away (low prices or nothing) camera's that I can easily turn into money. And my feedback is 100% positive. The money is real. Just two more sales today.🙂