Means your lawn tractor probably weighed around 400 lb. The price of new materials would be around $100. So that $89 gap must be larger than the sorting, transport, cutting, melting costs to make it profitable. Anyway its a 9:1 ratio. Aluminum has a much tighter ratio, around 2:1. But they both pay out money...because of authentic market drivers. Btw, steel and iron have dropped like a rock, ever since China decided to quit building empty cities. In 2007 you would have been paid $60 for that old mower.
I make more money with my crushed beer cans!