Microwaves have a transformer that can be useful or at least most do, switches, various lights and fixtures bits of insulated wire a fan usually and the metal in the case has been used for things. They have a capacitor and diodes in them, too but these are useless for our purposes generally.

Not much cash value but for some a nice batch of "stuff" you can use if resourceful.

Sometimes electronics has capacitors that can store a bit of a charge awhile after unplugged. Usually not lethal but enough snap to make you jump and all thats associated with quick movement in an enclosed space with sharp edges.

I scrapped a few and used lots of the bits over time.

Tom

Ignarus can exsisto rememdium. Sardus est forever

The transformer coils are worth quite a bit at the scrap yard if they are copper, but I wouldn't expend the effort to try reusing it as wire.
The transformer lamination pieces are worth quite a bit as parts (single rotor with laminations), or tools (in the process of gluing down magnets close together) for my tinkering.
Grind off the welds and the disassembly is a lot easier.

A handful of strange switches, fuse holders, bulb sockets, and short scrap wire is handy sometimes.
The aluminum layers between the magnets can be used for heat sinks.  Or scrap (take apart a dozen microwaves anyway, and the scrap value adds up pretty fast).
I even saved a few cases for the sheet metal.