Around here, there are 2 basic prices for scrap, based on the size of the pieces.
1. Long iron: Lower price/ton paid for this. It is also called unprocessed. I think anything with any dimension of more than about 3' is considered "long iron"
2. Short Iron: Higher price/ton paid for this. Also called processed scrap sometimes. All dimensions under about 3'.
Dimension limit may actually be more like 2', but I can not remember.
Jeff