Scrap is a strange industry, Bob. The way the prices work, it seems to be better to take them garbage than clean metal, as you say. A couple of years ago when I gave up bullet casting, I sold them 400 kg of small ingots, individually marked with the composition of that ingot. A lot of it was linotype, which is expensive. The result was $1 per kg, exactly the same as if I'd taken them the same weight of old wheelweights, still with the cast-in steel clips, and including kilograms of dirt, zinc weights (which contaminate the melt) and old tyre valves. I'm glad I at least kept the solder and pewter.