I am a mechanic and fix a lot of cars now that I am retired, I got a Nissan pick-up it needed a clutch and timing chain, my labour and a grand in parts made me a few grand. I have customers that get things done for free labour, because I can.
I do all my own plumbing repairs, most of my electrical problems, I fix bicycles for the local kids for free. I get people bringing me things they do not want, because I gave them a good deal and when I repair it and sell it they do not want 1/2 the profit. I remember and they get it later in parts and service.
I let it be known I wanted some good wood, and If I haul it and help him split it I get half he pays half the fuel, works for me. He estimates 8 cord that is three trips about $50.00 my costs.
You guys are right about some people throw out a lot of good stuff, I have a welding rod fridge and beer fridge for free, and they were delivered.
I cleaned a guys battery posts and coated them with Die-electric grease for free, he brought me a trailer with a damaged stub axle, repaired it, new lights, and spent maybe $150.00. It is for sale at $800 has a metal floor.