I've found it pretty rare to _not_ find something I'm looking for on Boston Craigslist. As something of an "out there" example, I found ten old tube TVs for my Halloween decorations just a few weeks ago. Also: I got an absolutely great deal on a car through Craigslist about five years ago.

That said, I've definitely had less success on the sales side than I did in years prior, but I can't tell if that's what I'm selling being worth less used these days (desktop computers?), or if Facebook Marketplace is the de-facto place to check.

Boston CL is indeed very stale, FB is way more active. Young people (< 35) seem to have mostly forgotten about CL or don't care about it.

Boston has a lot of good stuff in some areas. Need random leftover shelves? A pile of screened loam? Secondhand office furniture? An unused China set from the 1960s? No problem. But good luck trying to buy and sell normal home goods with any efficiency there; it will clear much much faster on FB marketplace. Maybe even for a better price.

Photography and Musical Instruments, it still seems pretty active. Though FB Marketplace is unfortunately making inroads the past couple years.