It is BX cable (Flexible metallic sheathed flexible cable)
Some have steel casing, some have aluminum casing.



You can sell it to your yard as-is, or break it down.
Do the math and see if it is worth it to you.
You can cut it into short lengths, and pull out the wire by clamping into your bench vice and pulling on the sheathing.
Some comes out easier than others.
... according to spin, anyway