Those boards are (we're) more expensive then you'd think. They're a glass bonded fibre. Not worth anything extra as scrap but expensive to make.
The first board is questionable but the rest is all telco. See what mls thinks but I'd say peripheral on the first one.
Pack those a bit better than most scrap though they have a habit of shattering, er, splintering; the shards are painful for the end recipients! So use a bit of paper or bubble wrap around them.
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