Untraceable gold loses about 10% of its value. But that's assuming you're a reputable seller, trading with a reputable buyer.

If you're a nobody, selling to someone who knows what theyre doing, expect to lose 25% or more for the risk incurred. But honestly, you're not realistically finding anyone reputable, you're finding someone else who wants the burden of finding someone else to sell it to, so expect to lose more.

But then throw on top the cost of the crucible, moulds, furnace, and losses incurred from inexperience trying to remove the traceable imperfections... As I said, its a massive pain in the ass...