I think that's good on the basis that if you are out collecting scrap there is more about for your to find as less people will be scrapping like when prices are sky high, but all time low would be around five to ten pound per ton like if was back in 2000 ish, also the iron grids would be classed as heavy so price always pays better than light stuff, I use emr aswell and there prices are always the best
Really, think about it, you see the p***y vans going round, old rolls of wire, the odd oven, bike wheels, usual shit we all throw out for them, then think how much that actually weighs, I can te