I was a garbage man for about a year. Found all kinds of stuff. Xbox360, Ps4, laptops, amps etc... And this was in a small town. I'm sure in a larger, wealthier city people throw away a lot of decent stuff. I didn't "dig through the garbage". Most of the time if someone was throwing away something like that, they just threw it beside the can. Made some easy money selling stuff I found a few times.
There are also people that make a living dumpster diving. Getting old lamps, TVs, microwaves, figurines, whatever that people throw away and sell them. All profit.