Depends on your "care-abouts".
I get paid way too much for engineering, to spend
hours sorting a pound of random parts no matter how
cheap.
Then there's the question of just how good (even if
"new", which may or may not be true) the parts are
and what is the consequence if you solder in a bad
one that you believed was good. Then chase it, find
it, rework it and hope nothing else got hurt (like, do
you -really- want to put in a junk 5V regulator and
roast everything on the board that hung off its output?).
Now in my broke-a$$ youth I surely did buy stuff out
of the Poly-Paks fliers when something in the bundle
was needed and I was unpaid and had nothing but
leisure time.
But most of the time what you want is cheap and
buying -only- what you want, guaranteed*good
and nothing but, is a better idea.
If you want junk, strip electronics boards for it.
There's a nonzero chance that this is where some
of the bag comes from anyway.
*guarantee? On electronic parts? Surely I jest.
Unless you want to go through the RMA process
which might fly with a direct or distribution sale,
but tell the OEM that you bought it by the pound
outside channels and enjoy the laughter....