There are pots out there on the market just for the purpose of melting led in. They are perfect for that purpose of melting led in and safer to use because they are heavier for better control. I don't buy them because I have no use for them. If I did need one I would not pay more than 10.00 to 15.00 for one. If I sold one I would not charge more than 10.00 to 15.00 for one. If I melted led I would never use a cooking item for that purpose. I do not sell on fleabay or appraise items, but if I did I would knock the value down on anything that was cracked, pitted, sanded, sand blasted, warped or painted. If your scotch bowl was in excellent condition, I would be willing to pay more than I would be willing to pay for a melting pot. It's getting to the point that almost every thing in today's market is Asian made, including cast iron. I believe that even Asian made cast iron has a value. I feel that the older Asian cast iron is collectible where as the modern Asian cast iron, to me does have some value, a lot less value than a melting pot. I highly recommend to never use any cooking utensil, no matter where it was made, for a melting pot. Buy a melting pot for what it was made for, a cooking pot for what it was made for, and for the sake of the unknown never miss use your scotch bowl to save money. The point that I'm trying to make is that even though your bowl owes you nothing means nothing to me. I wonder what your bowl owes the next generation. Most likely nothing , but maybe lead poison.
James Mummert