Dirty Aluminum pricing?

Why would you get dirty aluminum for them? I mean even clean (about .50 here) you're still only looking at $1 or so, but if you cut off the grip (and the plastic piece on big end if it has it) wouldn't it be clean?

the dirty al prices around here I have found run from 10-16 cents a pound.

Last year I brought in a couple of clean baseball bats with a large load. The load was well separated and prepared. The scale person pulls them off of my clean al pile and pays me dirty price for them. I question why and he says, "the inside always has a rubber liner inside so we need to give you dirty prices for bats." I had cut the ends off and pulled the rubber out of the inside already, but the bats were handle side up, so dude couldn't see that. I ask if he could show me. He says he can't as the rubber is in the inside. "BULLSH&^" was my reply. He pulls out a bat and starts repeating himself, "there is rubber in the middle of the bat, we only pay dirty prices, it is inside the bat I can't show you." My reply, "LOOK AT THE END OF THE BAT, I'VE CUT THE END OFF AND YOU CAN SEE DOWN IN IT!" The dude is holding the bat midway about shoulder height, so he just has to flip the bat around. As he does his eyes grow huge and face grows pale and he says, "nobody ever cleans bats."