I make a trip to scap yard about twice a year. I sell copper & brass that I accumulate on the job.
They only buy non ferris metal. They have tow motor bins right by counter & scales. The street people are there all the time selling small amounts of metal. The lead bin is right next to the door.
There was 10 or more Tin ingots I could see without digging. This is located in a mill town that has been wiped out when mills shut down. The ingots were for tin plate in one of the mills. They wouldn't sell me any "lead". The reason being they pay less than the yards futher up the river and don't want guys buying off them and running it further north to resale. I told them it was tin and they said they didn't have any way to check metals so it's lead to them. I've managed to get a good bit of tin that is laying around in the mill towns. Guys took it home to make sinkers and there is still a good bit of it around.