Big project at summer cottage warehouse

Hello!

My name is Toni and I'm from Finland. There is one big project at my summer cottage that I'm going to start tomorrow. There are so much vintage electronics devices, eletrical meters, transformers, copper cables, TV's, microwaves and other metallic stuff. So I'm going to post some pictures when I get there. So are there any advices you would give to me when I'm starting to get these precious metals from stuff. I'm talking about 100+ different sizes transformers and 100+ different devices.

Are there any scrap worth metals in vintage electrical meters?

And should I try to sell old big transformers or just scrap the metals from them?

Regards,
Toni