buying metal

I'm advertising, and have some other ideas that I've found from this site. I'm wondering at what point is it worth it to buy metals to then resell? I've seen another post on here about asking what stuff weighs. Knowing the weigh is important, and what it is worth is important too. I'm thinking of my local goodwill, thrift store, or garage sale. If I buy enough at the GW I can pay .89 per lb. I could see where it would be worth it for brass or copper, and maybe worthless for anything else. I did do well from an old sears table saw I got with a bandsaw from Craigslist for 20 bucks. I got 25 for junking the table saw, and eventually sold the bandsaw for 150. I'm looking to do some farm cleanouts maybe, and I'd like to offer some money in hopes to make several bucks?

you might coulda sold that sears tablesaw for more too

I get as much as I can free, if I have to pay for something I won't pay more than .05 cents per lbs. unless it is a computer tower or server and then it depends what is in them. just my .02

I also try to get as much as I can for free. I don't want the whole scrap metal pie, but just a piece of it. I know there is a niche out there somewhere, I just have to find it. I looked on ebay for those old sears saws thinking I might be able to sell it for parts, but not many of them had actually sold. I didn't want to take the time for Craigslist. Craigslist is hard sometimes, it all depends on what it is. I guess knowing what something weighs and what it is worth would be key, and then scan Craigslist possibly? Goodwill has all sorts of old stereo equipment that would produce some nice profits possibly if they would sell it cheap enough. I paid $5 bucks for an old unit just to rip it apart to see what was inside. Got most of the money back, but still came up about a buck fifty short. I won't do that again.