Disassembling hard drives - worth it?

I find that it does a few things for me.

1. The extra alum gets me to the 250 pound minimum to receive 3 extra cents a pound faster
2. Gives me something to do while watching a TV show. I take in 10 at a time and in 1 hour will have them all taken apart. This is only half paying attention too.
3. I get small bits of copper
4. When i finally get around to it i should make a decent killing on ebay with platters and magnets. I have like 25 pounds of platters so far.