I go to a weekly auction at a semi-Amish sale barn. Along with livestock, produce, and hay they have a "junk line" where people bring whatever they acquire from cleaning out the house, garage, or barn. Most stuff goes for a couple of dollars but there's always a few gems in there that go for $40 or better. You won't get rich but it does compensate you for the effort of getting it there. Best of all, you get rid of it.
In PA and MD I have worked with farm machinery clubs [like the Kinsler Rough and Tumble Engineers]. They can be discriminating [or picky] but will take interesting farm machinery.
I had an auction company clean out my mother's house. They were quick and relentless in sorting by keep, sell, and toss. They stuffed the sell items into a truck and took it to a weekly auction near Harrisburg and grossed $3,000, kept $1,000 for his trouble which I thought was fair. The advantage of this was he knew the market -- he knew what to keep and what to dump. Couldn't have done it without him.