I watched a bunch of Youtube videos about refining gold, specifically about my massive collection of computer parts. Plated and filled items would be essentially the same. Nasty stuff going there. There's a member here, can't remember his username - but his information was very valuable to my questions. If I remember correctly, the member sends a mass of plated and filled to a refiner, and collects basically on the refining results - but he does take a hit. However, he still does it! In life, every little bit helps.